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
wong john » wrong john, kong john, longo john
wong siu » wong shiu, kong siu, wong sau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doing sine fine ((china loren) OR (china lehren)) wong john ((wong siu) or (cong shu)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doing sine fine ((china loren) OR (china lehren)) wong john ((wong siu) OR (cong shu)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doing sine fine ((china loren) OR (china lehren)) wong john ((wong siu) or (cong shu)) ;*".