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

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) OR (longo john)) ((wong sau) OR (cong shu)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doing line file china ren ((wong john) OR (longo john)) ((wong sau) or (cong shu)) ;~".
• Adding a wildcard symbol may retrieve word variants: doing line file china ren ((wong john) OR (longo john)) ((wong sau) or (cong shu)) ;*.