Most of your search results will be unlicensed, if you're looking for music or movies. Most music & movies are copyrighted.

Stay away from files with huge numbers of sources. There are fake files all over the network. They'll sit connecting for ages, then get stuck needing sources forever. Try using the All Types search, search for artist or album rather than song title. Go for a file with 10 sources or less.

There's a lot more info & tips in these 2 threads.
Fake files showing up in search results
How to find music