Update find command in UG

docs/UserGuide.md

@@ -114,23 +114,30 @@ Examples:
 *  `edit 2 n/Betsy Crower c/` Edits the name of the 2nd student to be `Betsy Crower` and clears all existing courses.
 *  `edit 3 c/CS2103T;CS2101` Edits the courses of the 3rd student to be CS2103T & CS2101.
 
-### Locating students by name: `find`
+### Locating students by name and/or course: `find`
 
 Finds students whose names contain any of the given keywords.
 
 Format: `find KEYWORD [MORE_KEYWORDS]`
 
-* The search is case-insensitive. e.g `hans` will match `Hans`
-* The order of the keywords does not matter. e.g. `Hans Bo` will match `Bo Hans`
-* Only the name is searched.
-* Only full words will be matched e.g. `Han` will not match `Hans`
-* Students matching at least one keyword will be returned (i.e. `OR` search).
-  e.g. `Hans Bo` will return `Hans Gruber`, `Bo Yang`
+* The search is case-insensitive. e.g `hans` will match `Hans`, `cs2103t` will match `CS2103T`
+* Can search for names and courses. Use the `n/` prefix to search for names and the `c/` prefix to search for courses.
+* Partial searches will be matched e.g. `Jam` will match `James` and `James Ho`
+* Each sequence of words not separated by `;` or a prefix will be used as a search. This means that `jam ho` will not match `James Ho`
+* If a semicolon was used to separate searches, students matching at least one keyword will be returned (i.e. `OR` search). 
+* If a prefix was used to separate searches, students matching all keywords will be returned (i.e. `AND` search).
+* If no names are provided to the find command (i.e. `find n/`), all students will be listed.
+* **Warning**: `find c/` will not be treated as an error and will return 0 students. Refer to the [Proposed Features](#proposed features) below for details of the proposed changes to this command.
 
 Examples:
-* `find John` returns `john` and `John Doe`
-* `find alex david` returns `Alex Yeoh`, `David Li`<br>
-  ![result for 'find alex david'](images/findAlexDavidResult.png)
+* `find n/John` returns `john` and `John Doe`
+* `find n/alex;david` returns `Alex Yeoh`, `David Li`<br>
+  ![result for 'find n/peter;john'](images/findPeterJohnResult.png)
+* `find n/alex n/david` returns `Alex David`, if a student with that name exists
+* `find c/CS2103T c/CS2100` will return students who are taking both `CS2103T` and `CS2100`
+* `find n/alex c/cs2103t;cs2100` will return all students whose names contain `alex` and are taking at least one of `CS2103T` or `CS2101`.
+* `find n/` will return all students.
+* `find c/` will return no students.
 
 ### Deleting a student : `delete`