Perhaps you should try some spelling variations:
china loren » china lehren, china korea, china more
doing line » doing list, doing time, going live
line file » file file, line fcl
china ren » china real, china reza, china r
kong john » king john, wong 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 loren)) kong 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 loren)) kong john ((wong sau) or (cong shu)) ;~".
• Adding a wildcard symbol may retrieve word variants: doing line file ((china ren) OR (china loren)) kong john ((wong sau) or (cong shu)) ;*.