Perhaps you should try some spelling variations:
doing line » doing list, doing time, going live
china real » china's real, china dream, china rural
line file » file file, line fcl
china ren » china loren, china reza, china r
wong john » wrong john, kong john, longo 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) OR (china real)) wong john ((wong sau) OR (cong shu)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doing line file ((china ren) OR (china real)) wong john ((wong sau) or (cong shu)) ;~".
• Adding a wildcard symbol may retrieve word variants: doing line file ((china ren) OR (china real)) wong john ((wong sau) or (cong shu)) ;*.