[BUG] Buggy Find

[simonjulianl]

Bug Report

Summary

Cannot find and module after taking the module in a certain year or a certain semester, the application always return 0 modules listed. This might be because of the non uniform parameter as other commands use c/cs2103 but this uses c/ cs2103 which I need to assume

Expected Value

After taking a certain mod and tagging it, I should be able to use the find y/ or find s/ to find the modules.

Actual Value

0 modules always listed and unable to find any mods

Steps to Reproduce

1. Add and take the new module as shown in this picture

2. Run the command find y/5 or find s/2, which is supposed to return module 22 as shown in no 1