diff --git a/docs/CHANGELOG.rst b/docs/CHANGELOG.rst
index 9b4b77dcc..2f772fbe0 100644
--- a/docs/CHANGELOG.rst
+++ b/docs/CHANGELOG.rst
@@ -10,14 +10,21 @@ This project adheres to `Semantic Versioning <http://semver.org/>`_.
 Unreleased
 ==========
 
-Fix
----
-- Store refeneces to all subdirectories of the refenced files to the database
-
 Changed
 -------
 - Bulk delete method silently ignores non-existent objects and objects without
   edit permissions instead of raising an exception
+- Use ``simple_unaccent`` full text search configuration instead of ``simple``
+
+Added
+-----
+- Add unaccented full text search configuration ``simple_unaccent``
+
+Changed
+-------
+- Use ``simple_unaccent`` full text search configuration instead of ``simple``
+- Use ``simple_unaccent`` full text search configuration instead of ``simple``
+- Create ``simple_unaccent`` full text search index in ``PostgreSQL``
 
 
 ===================
@@ -42,12 +49,12 @@ Changed
 38.3.0 - 2024-01-11
 ===================
 
-Fix
----
+Fixed
+-----
 - Correctly clear ``Redis`` cache on data restart
 
-Add
----
+Added
+-----
 - Add ``clear_redis_cache`` management command
 - Add modified field to the ``AnnotationValue`` model and expose it in API
 
@@ -56,8 +63,8 @@ Add
 38.2.0 - 2023-12-15
 ===================
 
-Fix
----
+Fixed
+-----
 - Add default value for ``FLOW_PROCESSES_ALLOW_LIST`` and
   ``FLOW_PROCESSES_IGNORE_LIST`` in case of missing settings.
 - User defined slug must not be changed
@@ -90,6 +97,7 @@ Changed
 -------
 - Redis cache in listener is updated when data fields are retrieved from the
   database
+- Bulk annotations on entity endpoint now accept field path instead of id
 
 Added
 -----
@@ -108,10 +116,6 @@ Fixed
 - Already processed messages in listener are ignored for one day so messages
   are not processed twice
 
-Changed
--------
-- Bulk annotations on entity endpoint now accept field path instead of id
-
 
 ===================
 38.0.0 - 2023-11-13
@@ -158,6 +162,7 @@ Fixed
 -----
 - Set ``value`` to ``AnnotationValue`` object on duplication when it is created
 - Send ``post_duplicate`` signal only on successful duplication
+
 Changed
 -------
 - Simplify permission checks on ``AnontationValue`` endpoint
diff --git a/resolwe/flow/filters.py b/resolwe/flow/filters.py
index 453a5f53d..0c4440cc7 100644
--- a/resolwe/flow/filters.py
+++ b/resolwe/flow/filters.py
@@ -127,7 +127,7 @@ class TextFilterMixin:
 
     def filter_text(self, queryset: QuerySet, name: str, value: str):
         """Full-text search."""
-        query = SearchQuery(value, config="simple")
+        query = SearchQuery(value, config="simple_unaccent")
         return (
             queryset.filter(**{name: query})
             # This assumes that field is already a TextSearch vector and thus
diff --git a/resolwe/flow/migrations/0001_squashed_0043_full_text_search.py b/resolwe/flow/migrations/0001_squashed_0043_full_text_search.py
index eb9371a88..cc5e597a4 100644
--- a/resolwe/flow/migrations/0001_squashed_0043_full_text_search.py
+++ b/resolwe/flow/migrations/0001_squashed_0043_full_text_search.py
@@ -11,7 +11,12 @@
 import django.core.validators
 import django.db.models.deletion
 from django.conf import settings
-from django.contrib.postgres.operations import CITextExtension, TrigramExtension
+from django.contrib.postgres.operations import (
+    CITextExtension,
+    TrigramExtension,
+    UnaccentExtension,
+)
+
 from django.db import migrations, models
 
 import resolwe.flow.models.fields
@@ -27,6 +32,23 @@ class Migration(migrations.Migration):
     operations = [
         CITextExtension(),
         TrigramExtension(),
+        UnaccentExtension(),
+        migrations.RunSQL(
+            """
+            DO
+            $$BEGIN
+                CREATE TEXT SEARCH CONFIGURATION simple_unaccent( COPY = simple );
+            EXCEPTION
+                WHEN unique_violation THEN
+                    NULL;  -- ignore error
+            END;$$;
+            """
+        ),
+        migrations.RunSQL(
+            "ALTER TEXT SEARCH CONFIGURATION simple_unaccent "
+            + "ALTER MAPPING FOR hword, hword_part, word "
+            + "WITH unaccent, simple;"
+        ),
         migrations.CreateModel(
             name="Collection",
             fields=[
diff --git a/resolwe/flow/migrations/0022_add_unaccent_extension.py b/resolwe/flow/migrations/0022_add_unaccent_extension.py
new file mode 100644
index 000000000..89c5824fe
--- /dev/null
+++ b/resolwe/flow/migrations/0022_add_unaccent_extension.py
@@ -0,0 +1,13 @@
+# Generated by Django 4.2.9 on 2024-02-13 07:00
+
+from django.db import migrations
+from django.contrib.postgres.operations import UnaccentExtension
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("flow", "0021_annotationvalue_modified"),
+    ]
+
+    operations = [UnaccentExtension()]
diff --git a/resolwe/flow/migrations/0023_create_unaccent_full_text_search_config.py b/resolwe/flow/migrations/0023_create_unaccent_full_text_search_config.py
new file mode 100644
index 000000000..ae90e8a67
--- /dev/null
+++ b/resolwe/flow/migrations/0023_create_unaccent_full_text_search_config.py
@@ -0,0 +1,29 @@
+# Generated by Django 4.2.9 on 2024-02-13 07:01
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("flow", "0022_add_unaccent_extension"),
+    ]
+
+    operations = [
+        migrations.RunSQL(
+            """
+            DO
+            $$BEGIN
+                CREATE TEXT SEARCH CONFIGURATION simple_unaccent( COPY = simple );
+            EXCEPTION
+                WHEN unique_violation THEN
+                    NULL;  -- ignore error
+            END;$$;
+            """
+        ),
+        migrations.RunSQL(
+            "ALTER TEXT SEARCH CONFIGURATION simple_unaccent "
+            + "ALTER MAPPING FOR hword, hword_part, word "
+            + "WITH unaccent, simple;"
+        ),
+    ]
diff --git a/resolwe/flow/migrations/0024_use_unaccent_full_text_search.py b/resolwe/flow/migrations/0024_use_unaccent_full_text_search.py
new file mode 100644
index 000000000..7b7823a7f
--- /dev/null
+++ b/resolwe/flow/migrations/0024_use_unaccent_full_text_search.py
@@ -0,0 +1,35 @@
+# Generated by Django 4.2.9 on 2024-02-13 07:33
+
+import os
+
+from django.db import connection, migrations
+
+
+def load_triggers(apps, schema_editor):
+    file_names = [
+        "utils.sql",
+        "triggers_collection.sql",
+        "triggers_entity.sql",
+        "triggers_data.sql",
+    ]
+    with connection.cursor() as c:
+        for file_name in file_names:
+            file_path = os.path.join(os.path.dirname(__file__), file_name)
+            with open(file_path) as fh:
+                sql_statement = fh.read()
+            c.execute(sql_statement)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("flow", "0023_create_unaccent_full_text_search_config"),
+    ]
+
+    operations = [
+        migrations.RunPython(load_triggers),
+        # Update existing entries.
+        migrations.RunSQL("UPDATE flow_entity SET id=id;", migrations.RunSQL.noop),
+        migrations.RunSQL("UPDATE flow_collection SET id=id;", migrations.RunSQL.noop),
+        migrations.RunSQL("UPDATE flow_data SET id=id;", migrations.RunSQL.noop),
+    ]
diff --git a/resolwe/flow/migrations/triggers_collection.sql b/resolwe/flow/migrations/triggers_collection.sql
index 76b6b2878..5e271093b 100644
--- a/resolwe/flow/migrations/triggers_collection.sql
+++ b/resolwe/flow/migrations/triggers_collection.sql
@@ -30,33 +30,33 @@ CREATE OR REPLACE FUNCTION generate_resolwe_collection_search(collection flow_co
 
         SELECT
             -- Collection name.
-            setweight(to_tsvector('simple', collection.name), 'A') ||
-            setweight(to_tsvector('simple', get_characters(collection.name)), 'B') ||
-            setweight(to_tsvector('simple', get_numbers(collection.name)), 'B') ||
+            setweight(to_tsvector('simple_unaccent', collection.name), 'A') ||
+            setweight(to_tsvector('simple_unaccent', get_characters(collection.name)), 'B') ||
+            setweight(to_tsvector('simple_unaccent', get_numbers(collection.name)), 'B') ||
             -- Collection description.
-            setweight(to_tsvector('simple', collection.description), 'B') ||
+            setweight(to_tsvector('simple_unaccent', collection.description), 'B') ||
             -- Contributor username.
-            setweight(to_tsvector('simple', contributor.usernames), 'B') ||
-            setweight(to_tsvector('simple', get_characters(contributor.usernames)), 'C') ||
-            setweight(to_tsvector('simple', get_numbers(contributor.usernames)), 'C') ||
+            setweight(to_tsvector('simple_unaccent', contributor.usernames), 'B') ||
+            setweight(to_tsvector('simple_unaccent', get_characters(contributor.usernames)), 'C') ||
+            setweight(to_tsvector('simple_unaccent', get_numbers(contributor.usernames)), 'C') ||
             -- Contributor first name.
-            setweight(to_tsvector('simple', contributor.first_names), 'B') ||
+            setweight(to_tsvector('simple_unaccent', contributor.first_names), 'B') ||
             -- Contributor last name.
-            setweight(to_tsvector('simple', contributor.last_names), 'B') ||
+            setweight(to_tsvector('simple_unaccent', contributor.last_names), 'B') ||
             -- Owners usernames. There is no guarantee that it is not NULL.
-            setweight(to_tsvector('simple', COALESCE(owners.usernames, '')), 'B') ||
-            setweight(to_tsvector('simple', get_characters(owners.usernames)), 'C') ||
-            setweight(to_tsvector('simple', get_numbers(owners.usernames)), 'C') ||
+            setweight(to_tsvector('simple_unaccent', COALESCE(owners.usernames, '')), 'B') ||
+            setweight(to_tsvector('simple_unaccent', get_characters(owners.usernames)), 'C') ||
+            setweight(to_tsvector('simple_unaccent', get_numbers(owners.usernames)), 'C') ||
             -- Owners first names. There is no guarantee that it is not NULL.
-            setweight(to_tsvector('simple', COALESCE(owners.first_names, '')), 'B') ||
+            setweight(to_tsvector('simple_unaccent', COALESCE(owners.first_names, '')), 'B') ||
             -- Owners last names. There is no guarantee that it is not NULL.
-            setweight(to_tsvector('simple', COALESCE(owners.last_names, '')), 'B') ||
+            setweight(to_tsvector('simple_unaccent', COALESCE(owners.last_names, '')), 'B') ||
             -- Collection tags.
-            setweight(to_tsvector('simple', array_to_string(collection.tags, ' ')), 'B') ||
+            setweight(to_tsvector('simple_unaccent', array_to_string(collection.tags, ' ')), 'B') ||
             -- Collection descriptor.
-            setweight(to_tsvector('simple', flat_descriptor), 'C') ||
-            setweight(to_tsvector('simple', get_characters(flat_descriptor)), 'D') ||
-            setweight(to_tsvector('simple', get_numbers(flat_descriptor)), 'D')
+            setweight(to_tsvector('simple_unaccent', flat_descriptor), 'C') ||
+            setweight(to_tsvector('simple_unaccent', get_characters(flat_descriptor)), 'D') ||
+            setweight(to_tsvector('simple_unaccent', get_numbers(flat_descriptor)), 'D')
 
         INTO search;
 
@@ -79,11 +79,14 @@ CREATE OR REPLACE FUNCTION collection_biut()
     END;
     $$;
 
-CREATE TRIGGER collection_biut
-    BEFORE INSERT OR UPDATE
-    ON flow_collection
-    FOR EACH ROW EXECUTE PROCEDURE collection_biut();
-
+DO $$ BEGIN
+    CREATE TRIGGER collection_biut
+        BEFORE INSERT OR UPDATE
+        ON flow_collection
+        FOR EACH ROW EXECUTE PROCEDURE collection_biut();
+EXCEPTION
+  WHEN others THEN null;
+END $$;
 
 -- Trigger after update/insert/delete user permission object.
 CREATE OR REPLACE FUNCTION handle_userpermission_collection(user_permission permissions_permissionmodel)
@@ -114,10 +117,14 @@ CREATE OR REPLACE FUNCTION userpermission_collection_aiut()
     END;
     $$;
 
-CREATE TRIGGER userpermission_collection_aiut
-    AFTER INSERT OR UPDATE
-    ON permissions_permissionmodel
-    FOR EACH ROW EXECUTE PROCEDURE userpermission_collection_aiut();
+DO $$ BEGIN
+    CREATE TRIGGER userpermission_collection_aiut
+        AFTER INSERT OR UPDATE
+        ON permissions_permissionmodel
+        FOR EACH ROW EXECUTE PROCEDURE userpermission_collection_aiut();
+EXCEPTION
+  WHEN others THEN null;
+END $$;
 
 CREATE OR REPLACE FUNCTION userpermission_collection_adt()
     RETURNS TRIGGER
@@ -129,12 +136,15 @@ CREATE OR REPLACE FUNCTION userpermission_collection_adt()
     END;
     $$;
 
-CREATE TRIGGER userpermission_collection_adt
-    AFTER DELETE
-    -- ON guardian_userobjectpermission
-    ON permissions_permissionmodel
-    FOR EACH ROW EXECUTE PROCEDURE userpermission_collection_adt();
-
+DO $$ BEGIN
+    CREATE TRIGGER userpermission_collection_adt
+        AFTER DELETE
+        -- ON guardian_userobjectpermission
+        ON permissions_permissionmodel
+        FOR EACH ROW EXECUTE PROCEDURE userpermission_collection_adt();
+EXCEPTION
+  WHEN others THEN null;
+END $$;
 
 -- Trigger after update contributor.
 CREATE OR REPLACE FUNCTION collection_contributor_aut()
@@ -149,11 +159,14 @@ CREATE OR REPLACE FUNCTION collection_contributor_aut()
     END;
     $$;
 
-CREATE TRIGGER collection_contributor_aut
-    AFTER UPDATE
-    ON auth_user
-    FOR EACH ROW EXECUTE PROCEDURE collection_contributor_aut();
-
+DO $$ BEGIN
+    CREATE TRIGGER collection_contributor_aut
+        AFTER UPDATE
+        ON auth_user
+        FOR EACH ROW EXECUTE PROCEDURE collection_contributor_aut();
+EXCEPTION
+  WHEN others THEN null;
+END $$;
 
 -- Trigger after update owner.
 CREATE OR REPLACE FUNCTION collection_owner_aut()
@@ -178,7 +191,11 @@ CREATE OR REPLACE FUNCTION collection_owner_aut()
     END;
     $$;
 
-CREATE TRIGGER collection_owner_aut
-    AFTER UPDATE
-    ON auth_user
-    FOR EACH ROW EXECUTE PROCEDURE collection_owner_aut();
+DO $$ BEGIN
+    CREATE TRIGGER collection_owner_aut
+        AFTER UPDATE
+        ON auth_user
+        FOR EACH ROW EXECUTE PROCEDURE collection_owner_aut();
+EXCEPTION
+  WHEN others THEN null;
+END $$;
diff --git a/resolwe/flow/migrations/triggers_data.sql b/resolwe/flow/migrations/triggers_data.sql
index 767765c1d..cac8ad7fa 100644
--- a/resolwe/flow/migrations/triggers_data.sql
+++ b/resolwe/flow/migrations/triggers_data.sql
@@ -1,8 +1,12 @@
 -- Trigger after insert/update Data object.
-CREATE TYPE process_result AS (
-    name text,
-    type text
-);
+DO $$ BEGIN
+    CREATE TYPE process_result AS (
+        name text,
+        type text
+    );
+EXCEPTION
+    WHEN duplicate_object THEN null;
+END $$;
 
 CREATE OR REPLACE FUNCTION generate_resolwe_data_search(data flow_data)
     RETURNS tsvector
@@ -38,37 +42,37 @@ CREATE OR REPLACE FUNCTION generate_resolwe_data_search(data flow_data)
 
         SELECT
             -- Data name.
-            setweight(to_tsvector('simple', data.name), 'A') ||
-            setweight(to_tsvector('simple', get_characters(data.name)), 'B') ||
-            setweight(to_tsvector('simple', get_numbers(data.name)), 'B') ||
+            setweight(to_tsvector('simple_unaccent', data.name), 'A') ||
+            setweight(to_tsvector('simple_unaccent', get_characters(data.name)), 'B') ||
+            setweight(to_tsvector('simple_unaccent', get_numbers(data.name)), 'B') ||
             -- Contributor username.
-            setweight(to_tsvector('simple', contributor.usernames), 'B') ||
-            setweight(to_tsvector('simple', get_characters(contributor.usernames)), 'C') ||
-            setweight(to_tsvector('simple', get_numbers(contributor.usernames)), 'C') ||
+            setweight(to_tsvector('simple_unaccent', contributor.usernames), 'B') ||
+            setweight(to_tsvector('simple_unaccent', get_characters(contributor.usernames)), 'C') ||
+            setweight(to_tsvector('simple_unaccent', get_numbers(contributor.usernames)), 'C') ||
             -- Contributor first name.
-            setweight(to_tsvector('simple', contributor.first_names), 'B') ||
+            setweight(to_tsvector('simple_unaccent', contributor.first_names), 'B') ||
             -- Contributor last name.
-            setweight(to_tsvector('simple', contributor.last_names), 'B') ||
+            setweight(to_tsvector('simple_unaccent', contributor.last_names), 'B') ||
             -- Owners usernames. There is no guarantee that it is not NULL.
-            setweight(to_tsvector('simple', COALESCE(owners.usernames, '')), 'B') ||
-            setweight(to_tsvector('simple', get_characters(owners.usernames)), 'C') ||
-            setweight(to_tsvector('simple', get_numbers(owners.usernames)), 'C') ||
+            setweight(to_tsvector('simple_unaccent', COALESCE(owners.usernames, '')), 'B') ||
+            setweight(to_tsvector('simple_unaccent', get_characters(owners.usernames)), 'C') ||
+            setweight(to_tsvector('simple_unaccent', get_numbers(owners.usernames)), 'C') ||
             -- Owners first names. There is no guarantee that it is not NULL.
-            setweight(to_tsvector('simple', COALESCE(owners.first_names, '')), 'B') ||
+            setweight(to_tsvector('simple_unaccent', COALESCE(owners.first_names, '')), 'B') ||
             -- Owners last names. There is no guarantee that it is not NULL.
-            setweight(to_tsvector('simple', COALESCE(owners.last_names, '')), 'B') ||
+            setweight(to_tsvector('simple_unaccent', COALESCE(owners.last_names, '')), 'B') ||
             -- Process name.
-            setweight(to_tsvector('simple', process.name), 'B') ||
-            setweight(to_tsvector('simple', get_characters(process.name)), 'C') ||
-            setweight(to_tsvector('simple', get_numbers(process.name)), 'C') ||
+            setweight(to_tsvector('simple_unaccent', process.name), 'B') ||
+            setweight(to_tsvector('simple_unaccent', get_characters(process.name)), 'C') ||
+            setweight(to_tsvector('simple_unaccent', get_numbers(process.name)), 'C') ||
             -- Process type.
-            setweight(to_tsvector('simple', process.type), 'D') ||
+            setweight(to_tsvector('simple_unaccent', process.type), 'D') ||
             -- Data tags.
-            setweight(to_tsvector('simple', array_to_string(data.tags, ' ')), 'B') ||
+            setweight(to_tsvector('simple_unaccent', array_to_string(data.tags, ' ')), 'B') ||
             -- Data descriptor.
-            setweight(to_tsvector('simple', flat_descriptor), 'C') ||
-            setweight(to_tsvector('simple', get_characters(flat_descriptor)), 'D') ||
-            setweight(to_tsvector('simple', get_numbers(flat_descriptor)), 'D')
+            setweight(to_tsvector('simple_unaccent', flat_descriptor), 'C') ||
+            setweight(to_tsvector('simple_unaccent', get_characters(flat_descriptor)), 'D') ||
+            setweight(to_tsvector('simple_unaccent', get_numbers(flat_descriptor)), 'D')
         INTO search;
 
         RETURN search;
@@ -90,11 +94,14 @@ CREATE OR REPLACE FUNCTION data_biut()
     END;
     $$;
 
-CREATE TRIGGER data_biut
-    BEFORE INSERT OR UPDATE
-    ON flow_data
-    FOR EACH ROW EXECUTE PROCEDURE data_biut();
-
+DO $$ BEGIN
+    CREATE TRIGGER data_biut
+        BEFORE INSERT OR UPDATE
+        ON flow_data
+        FOR EACH ROW EXECUTE PROCEDURE data_biut();
+EXCEPTION
+  WHEN others THEN null;
+END $$;
 
 -- Trigger after update/insert/delete user permission object.
 CREATE OR REPLACE FUNCTION handle_userpermission_data(user_permission permissions_permissionmodel)
@@ -125,10 +132,14 @@ CREATE OR REPLACE FUNCTION userpermission_data_aiut()
     END;
     $$;
 
-CREATE TRIGGER userpermission_data_aiut
-    AFTER INSERT OR UPDATE
-    ON permissions_permissionmodel
-    FOR EACH ROW EXECUTE PROCEDURE userpermission_data_aiut();
+DO $$ BEGIN
+    CREATE TRIGGER userpermission_data_aiut
+        AFTER INSERT OR UPDATE
+        ON permissions_permissionmodel
+        FOR EACH ROW EXECUTE PROCEDURE userpermission_data_aiut();
+EXCEPTION
+  WHEN others THEN null;
+END $$;
 
 CREATE OR REPLACE FUNCTION userpermission_data_adt()
     RETURNS TRIGGER
@@ -140,10 +151,14 @@ CREATE OR REPLACE FUNCTION userpermission_data_adt()
     END;
     $$;
 
-CREATE TRIGGER userpermission_data_adt
-    AFTER DELETE
-    ON permissions_permissionmodel
-    FOR EACH ROW EXECUTE PROCEDURE userpermission_data_adt();
+DO $$ BEGIN
+    CREATE TRIGGER userpermission_data_adt
+        AFTER DELETE
+        ON permissions_permissionmodel
+        FOR EACH ROW EXECUTE PROCEDURE userpermission_data_adt();
+EXCEPTION
+  WHEN others THEN null;
+END $$;
 
 
 -- Trigger after update contributor.
@@ -159,11 +174,14 @@ CREATE OR REPLACE FUNCTION data_contributor_aut()
     END;
     $$;
 
-CREATE TRIGGER data_contributor_aut
-    AFTER UPDATE
-    ON auth_user
-    FOR EACH ROW EXECUTE PROCEDURE data_contributor_aut();
-
+DO $$ BEGIN
+    CREATE TRIGGER data_contributor_aut
+        AFTER UPDATE
+        ON auth_user
+        FOR EACH ROW EXECUTE PROCEDURE data_contributor_aut();
+EXCEPTION
+  WHEN others THEN null;
+END $$;
 
 -- Trigger after update owner.
 CREATE OR REPLACE FUNCTION data_owner_aut()
@@ -188,7 +206,11 @@ CREATE OR REPLACE FUNCTION data_owner_aut()
     END;
     $$;
 
-CREATE TRIGGER data_owner_aut
-    AFTER UPDATE
-    ON auth_user
-    FOR EACH ROW EXECUTE PROCEDURE data_owner_aut();
+DO $$ BEGIN
+    CREATE TRIGGER data_owner_aut
+        AFTER UPDATE
+        ON auth_user
+        FOR EACH ROW EXECUTE PROCEDURE data_owner_aut();
+EXCEPTION
+  WHEN others THEN null;
+END $$;
diff --git a/resolwe/flow/migrations/triggers_entity.sql b/resolwe/flow/migrations/triggers_entity.sql
index 4588a7c32..440dde021 100644
--- a/resolwe/flow/migrations/triggers_entity.sql
+++ b/resolwe/flow/migrations/triggers_entity.sql
@@ -4,6 +4,7 @@ CREATE OR REPLACE FUNCTION generate_resolwe_entity_search(entity flow_entity)
     LANGUAGE plpgsql
     AS $$
     DECLARE
+        annotation_values annotations_result;
         owners users_result;
         contributor users_result;
         flat_descriptor text;
@@ -26,37 +27,41 @@ CREATE OR REPLACE FUNCTION generate_resolwe_entity_search(entity flow_entity)
         FROM auth_user
         WHERE id = entity.contributor_id;
 
+        SELECT
+            _value -> 'label' as values
+        INTO annotation_values
+        FROM flow_annotationvalue
+        WHERE entity_id = entity.id;
+
         SELECT COALESCE(flatten_descriptor_values(entity.descriptor), '') INTO flat_descriptor;
 
         SELECT
             -- Entity name.
-            setweight(to_tsvector('simple', entity.name), 'A') ||
-            setweight(to_tsvector('simple', get_characters(entity.name)), 'B') ||
-            setweight(to_tsvector('simple', get_numbers(entity.name)), 'B') ||
-            -- Collection description.
-            setweight(to_tsvector('simple', entity.description), 'B') ||
+            setweight(to_tsvector('simple_unaccent', entity.name), 'A') ||
+            setweight(to_tsvector('simple_unaccent', get_characters(entity.name)), 'B') ||
+            setweight(to_tsvector('simple_unaccent', get_numbers(entity.name)), 'B') ||
+            -- Entity description.
+            setweight(to_tsvector('simple_unaccent', entity.description), 'B') ||
             -- Contributor username.
-            setweight(to_tsvector('simple', contributor.usernames), 'B') ||
-            setweight(to_tsvector('simple', get_characters(contributor.usernames)), 'C') ||
-            setweight(to_tsvector('simple', get_numbers(contributor.usernames)), 'C') ||
+            setweight(to_tsvector('simple_unaccent', contributor.usernames), 'B') ||
+            setweight(to_tsvector('simple_unaccent', get_characters(contributor.usernames)), 'C') ||
+            setweight(to_tsvector('simple_unaccent', get_numbers(contributor.usernames)), 'C') ||
             -- Contributor first name.
-            setweight(to_tsvector('simple', contributor.first_names), 'B') ||
+            setweight(to_tsvector('simple_unaccent', contributor.first_names), 'B') ||
             -- Contributor last name.
-            setweight(to_tsvector('simple', contributor.last_names), 'B') ||
+            setweight(to_tsvector('simple_unaccent', contributor.last_names), 'B') ||
             -- Owners usernames. There is no guarantee that it is not NULL.
-            setweight(to_tsvector('simple', COALESCE(owners.usernames, '')), 'B') ||
-            setweight(to_tsvector('simple', get_characters(owners.usernames)), 'C') ||
-            setweight(to_tsvector('simple', get_numbers(owners.usernames)), 'C') ||
+            setweight(to_tsvector('simple_unaccent', COALESCE(owners.usernames, '')), 'B') ||
+            setweight(to_tsvector('simple_unaccent', get_characters(owners.usernames)), 'C') ||
+            setweight(to_tsvector('simple_unaccent', get_numbers(owners.usernames)), 'C') ||
             -- Owners first names. There is no guarantee that it is not NULL.
-            setweight(to_tsvector('simple', COALESCE(owners.first_names, '')), 'B') ||
+            setweight(to_tsvector('simple_unaccent', COALESCE(owners.first_names, '')), 'B') ||
             -- Owners last names. There is no guarantee that it is not NULL.
-            setweight(to_tsvector('simple', COALESCE(owners.last_names, '')), 'B') ||
+            setweight(to_tsvector('simple_unaccent', COALESCE(owners.last_names, '')), 'B') ||
             -- Entity tags.
-            setweight(to_tsvector('simple', array_to_string(entity.tags, ' ')), 'B') ||
-            -- Entity descriptor.
-            setweight(to_tsvector('simple', flat_descriptor), 'C') ||
-            setweight(to_tsvector('simple', get_characters(flat_descriptor)), 'D') ||
-            setweight(to_tsvector('simple', get_numbers(flat_descriptor)), 'D')
+            setweight(to_tsvector('simple_unaccent', array_to_string(entity.tags, ' ')), 'B') ||
+            -- Entity annotations.
+            setweight(to_tsvector('simple_unaccent', COALESCE(annotation_values.values, '')), 'C')
 
         INTO search;
 
@@ -79,11 +84,14 @@ CREATE OR REPLACE FUNCTION entity_biut()
     END;
     $$;
 
-CREATE TRIGGER entity_biut
-    BEFORE INSERT OR UPDATE
-    ON flow_entity
-    FOR EACH ROW EXECUTE PROCEDURE entity_biut();
-
+DO $$ BEGIN
+    CREATE TRIGGER entity_biut
+        BEFORE INSERT OR UPDATE
+        ON flow_entity
+        FOR EACH ROW EXECUTE PROCEDURE entity_biut();
+EXCEPTION
+  WHEN others THEN null;
+END $$;
 
 -- Trigger after update/insert/delete user permission object.
 CREATE OR REPLACE FUNCTION handle_userpermission_entity(user_permission permissions_permissionmodel)
@@ -114,10 +122,14 @@ CREATE OR REPLACE FUNCTION userpermission_entity_aiut()
     END;
     $$;
 
-CREATE TRIGGER userpermission_entity_aiut
-    AFTER INSERT OR UPDATE
-    ON permissions_permissionmodel
-    FOR EACH ROW EXECUTE PROCEDURE userpermission_entity_aiut();
+DO $$ BEGIN
+    CREATE TRIGGER userpermission_entity_aiut
+        AFTER INSERT OR UPDATE
+        ON permissions_permissionmodel
+        FOR EACH ROW EXECUTE PROCEDURE userpermission_entity_aiut();
+EXCEPTION
+  WHEN others THEN null;
+END $$;
 
 CREATE OR REPLACE FUNCTION userpermission_entity_adt()
     RETURNS TRIGGER
@@ -129,11 +141,14 @@ CREATE OR REPLACE FUNCTION userpermission_entity_adt()
     END;
     $$;
 
-CREATE TRIGGER userpermission_entity_adt
-    AFTER DELETE
-    ON permissions_permissionmodel
-    FOR EACH ROW EXECUTE PROCEDURE userpermission_entity_adt();
-
+DO $$ BEGIN
+    CREATE TRIGGER userpermission_entity_adt
+        AFTER DELETE
+        ON permissions_permissionmodel
+        FOR EACH ROW EXECUTE PROCEDURE userpermission_entity_adt();
+EXCEPTION
+  WHEN others THEN null;
+END $$;
 
 -- Trigger after update contributor.
 CREATE OR REPLACE FUNCTION entity_contributor_aut()
@@ -148,11 +163,14 @@ CREATE OR REPLACE FUNCTION entity_contributor_aut()
     END;
     $$;
 
-CREATE TRIGGER entity_contributor_aut
-    AFTER UPDATE
-    ON auth_user
-    FOR EACH ROW EXECUTE PROCEDURE entity_contributor_aut();
-
+DO $$ BEGIN
+    CREATE TRIGGER entity_contributor_aut
+        AFTER UPDATE
+        ON auth_user
+        FOR EACH ROW EXECUTE PROCEDURE entity_contributor_aut();
+EXCEPTION
+    WHEN others THEN null;
+END $$;
 
 -- Trigger after update owner.
 CREATE OR REPLACE FUNCTION entity_owner_aut()
@@ -178,7 +196,11 @@ CREATE OR REPLACE FUNCTION entity_owner_aut()
     END;
     $$;
 
-CREATE TRIGGER entity_owner_aut
-    AFTER UPDATE
-    ON auth_user
-    FOR EACH ROW EXECUTE PROCEDURE entity_owner_aut();
+DO $$ BEGIN
+    CREATE TRIGGER entity_owner_aut
+        AFTER UPDATE
+        ON auth_user
+        FOR EACH ROW EXECUTE PROCEDURE entity_owner_aut();
+EXCEPTION
+    WHEN others THEN null;
+END $$;
diff --git a/resolwe/flow/migrations/utils.sql b/resolwe/flow/migrations/utils.sql
index 75780cd76..6b8b174c3 100644
--- a/resolwe/flow/migrations/utils.sql
+++ b/resolwe/flow/migrations/utils.sql
@@ -1,8 +1,20 @@
-CREATE TYPE users_result AS (
-    usernames text,
-    first_names text,
-    last_names text
-);
+DO $$ BEGIN
+    CREATE TYPE users_result AS (
+        usernames text,
+        first_names text,
+        last_names text
+    );
+EXCEPTION
+    WHEN duplicate_object THEN null;
+END $$;
+
+DO $$ BEGIN
+    CREATE TYPE annotations_result AS (
+        values text
+    );
+EXCEPTION
+    WHEN duplicate_object THEN null;
+END $$;
 
 CREATE OR REPLACE FUNCTION edge_ngrams(text text)
     RETURNS tsvector
@@ -11,7 +23,7 @@ CREATE OR REPLACE FUNCTION edge_ngrams(text text)
         SELECT COALESCE(
             array_to_tsvector((
                 SELECT array_agg(DISTINCT substring(lexeme for len))
-                FROM unnest(to_tsvector('simple', text)), generate_series(1,length(lexeme)) len
+                FROM unnest(to_tsvector('simple_unaccent', text)), generate_series(1,length(lexeme)) len
             )),
             ''::tsvector
         )