Perhaps you should try some spelling variations:
sine finance » sina finance, sense finance, sme finance
china loren » china lehren, china korea, china more
doing sine » doing time, doing science
china ren » china real, china reza, china r
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: doing sine finance ((china ren) OR (china loren)) wong john ((wong siu) OR (cong shu)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doing sine finance ((china ren) OR (china loren)) wong john ((wong siu) or (cong shu)) ;~".
• Adding a wildcard symbol may retrieve word variants: doing sine finance ((china ren) OR (china loren)) wong john ((wong siu) or (cong shu)) ;*.