It's very simple to use if you know how it works.
Like this;
You search say,
Apple Pie.
Instead of searching the forums for posts containing "Apple Pie" It searches for both words, but individually.
Also, longer searches have less results.
Like this;
If you search "Bio-Force Gun or Big loving Gun"
you get like ten results. Instead of the above search, just do "BFG9000"
Hopefully this will help you get a better understanding of the search engine.
This, and if you are looking for an add-on...
Don't just look everywhere, and in message bodies.
Check off "Search in topic titles only" and scroll down to:

Choose a board to search in, or search all
[ x ]
Check allTurn off check all, expand the list, and click only Add-ons and RTB Listings.
The search thing sucks anyways, half the time it doesn't even turn up what I entered.
Learn how to search. You're probably so bad you'll get Snails out of searching for hair cutting place.