You will need to learn to search for different words using a torrent search engine, I recommend:
1. By actors name alone, no other words: Example "Charles Bronson."
2. By actors name and the word "Collection."
Word Searches to try: Always with the actor, actress or director in front of the word, or other types of collections.
4: tetralogy or quadrilogy
5: pentalogy 6: hexology
7: heptalogy or septology or septet
You can search for just the words above, and then try to find interesting collections to download.
Travelers can sell collectionss of movies to other traveler or tourist easier than one movie.