They're probably fakes. See: Fake files showing up in search results

For tips on searching, see: How to find music(and movies).

Also try the suggestions in this thread for blocking bad ip's: Problems with the search

Check files with Bitzi Web Lookup before downloading. It'll help you sort out the good ones. While on the Bitzi site, search for the file there and use the magnet link to start the d/load in limewire. Then search for it again in LW to help find some sources for the file.
Also preview the file when it gets to 10-15% to check that it's what the title says and not mislabeled porn.

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