Perhaps you should try some spelling variations:
kong remaining » kong remain, change remaining
remaining time » learning time, reading time, remaining topics
feng douglas » zeng douglas, long douglas, webb douglas
farr douglas » farah douglas, ward douglas, arner douglas
cost thing » last thing, best thing, cost sharing
tan kong » tan hong

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tan kong remaining time cost thing ((feng douglas) OR (farr douglas)) b ;~.
• Adding a wildcard symbol may retrieve word variants: tan kong remaining time cost thing ((feng douglas) or (farr douglas)) b ;*.