It would help to know which LW version you are using.
Can depend on peers you are connected to sometimes. Are you using the
Find More Results option? Varying your search criteria can also help greatly. Sometimes if you search the same term continuously, some peers see you as some form of spam & may stop responding to your search requests.
Check those search results with the trash-can. Some or many may not be junk after all. Personally I prefer using the
Classic View of search results with LW 5. In this way after enabling the Bitrate column for music I can see if the results in fact have a bitrate & whether they look dodgy compared to their file size & supposed length/duration.
How to switch to Classic View