Perhaps you should try some spelling variations:
doing line » doing list, doing time, going live
file china » role china, size china, profile china
line file » file file, line fcl
china ren » china loren, china real, china reza
wong john » wrong john, kong john, longo john
ren wong » ren weng
wong sam » wong sau, wong lai, kong sar

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: doing line file china ren wong john ((wong sam) OR (cong shu)) ;~.
• Adding a wildcard symbol may retrieve word variants: doing line file china ren wong john ((wong sam) or (cong shu)) ;*.