Try https://www.coveapp.info/, I mentioned it here: https://news.ycombinator.com/item?id=39425381. I wrote a custom search implementation for torrents that uses keyword matching and boosts search scores based on popularity of torrents on the DHT. It feels very much like TPB search but not so aggressively focused on seeder counts (i.e. better matching on file names can outrank a higher seeder count).