You can search for TV series or films/movies in the top-right search box.
- Then scroll through list to find movie-type (eg. BDRip or HD).
- Try to avoid multiple-CD-type subtitles if your movie is one file.
- Try to find subtitle pack which includes both ENGLISH & CHINESE (separate files or combined doesn't matter).
- Download and test-run the subtitle with your movie via VLC or BSplayer. Check the starting subtitle and ending subtitles.
- If subtitle is wrong, you can either download/try another, or manually fix (Subtitle Edit is great fix app).
Other sites to try:
http://www.iswind.com/
http://www.xiaohx.com/
http://www.yifysubtitles.com/