Perhaps you should try some spelling variations:
china lehren » china ren
china loren » china korea, china more, china ren
doing sine » doing time, doing science
sine fine » fine line, die fine, line file
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 sine fine ((china loren) OR (china lehren)) kong john ((wong sau) OR (cong shu)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doing sine fine ((china loren) OR (china lehren)) kong john ((wong sau) or (cong shu)) ;~".
• Adding a wildcard symbol may retrieve word variants: doing sine fine ((china loren) OR (china lehren)) kong john ((wong sau) or (cong shu)) ;*.