If you are trying to get the subtitles to work with your video file, here are a few reliable spots to check:
One of the largest databases. You can often find multiple language options for this specific 720p release. subtitle Boys.Don't.Cry.1999.720p.BluRay.x264-[...
A popular community-driven site. You can search for the movie and look for the specific "YIFY" or "720p BluRay" version to ensure the timing (sync) is perfect. If you are trying to get the subtitles