Besides adding "torrent" word while googling, one good search engine is https://torrentz.eu/

From that, you can as well find about http://www.monova.org/ http://kickass.so/ etc...

Also, high quality sites, albeit in russian:

http://rutracker.org/

http://newstudio.tv/

http://www.lostfilm.tv/

http://nnm-club.me/ is also OK