If you can’t find a specific Torrent file you are looking for then a dedicated bittorrent search engines may be able to help you out. Sites like Sumo Torrent and Kickass Torrents are a Bittorrent Indexers which are a type of search engine but if you are really having trouble locating the torrent file you are looking for try one of these dedicated torrent search engines.
The bittorrent search engines indext not only the larger public torrent sites but also the smaller less known sites so if your file exists then one of these bittorrent search engines should find it.