Sometimes it's better to just start a new search. The old source(s) might have logged off. Try using the All Types search, rather than Audio - this can give you really different results. Vary your search terms too, try searching for artist name or album, rather than song title. Try to download from multiple hosts & go for the 4 or 3 star results

You can preview the songs while you're downloading. That way, you'll get an idea of quality. If one host seems to have a few corrupt files... stay away from them & choose another host.