Go to any recording and click "relate to". Search for a work named 藉口, which there currently appears to be 2 of:

http://musicbrainz.org/work/bec8c68e-f127-31aa-92c1-d616e8940f7d
http://musicbrainz.org/work/19d34346-7efe-3925-b337-8e52f7819384

There's no disambiguation here as there is when matching recordings in the release editor, which makes it necessary to try one after the other until the right one is found. When searching for a work with a very common title like "631" you just get page after page of things you can't distinguish.

By the way, awesome job on NGS! I hope you don't mind all my bug reports