Press G to delay the subtitle or H to speed it up by 50ms increments.
If the dialogue doesn't match the audio (which can happen if the BluRay rip has a different frame rate than the subtitle was made for): subtitle Disturbing.Behavior.1998.720p.BluRay.x...
Use a site like SubtitleTools.com to "Shift" the entire timing if it is consistently off by a few seconds. Press G to delay the subtitle or H
Example: Disturbing.Behavior.1998.720p.BluRay.x264.mkv and Disturbing.Behavior.1998.720p.BluRay.x264.srt . Place both files in the same folder. subtitle Disturbing.Behavior.1998.720p.BluRay.x...
Since the file name matches a common scene release, you can find the exact .srt or .ass file on these major subtitle databases: