I can't get any search results
 

I've been using LW for a few weeks and I've not had any problems until now. When I try to do a search the name of the search comes up in the tab, but there isn't any results.

Try the advice here.
Problems with the search

If that doesn't help then delete LW's preferences folder when LW's properly closed. See point 3 below (also point 2 if you've used much older versions of LW in the past...there could be a folder in either location).
Fixes for LimeWire
This will kill all of your settings within LW's options, you'll have to go back through & reset things afterwards;)