Perhaps you should try some spelling variations:
china loren » china lehren, china korea, china more
doing pin » doing un, doing von, dong ping
china ren » china real, china reza, china r
wong john » wrong john, kong john, longo john
pin lens » thin lens, pin fins, six lens
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 pin lens ((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 pin lens ((china ren) OR (china loren)) wong john ((wong siu) or (cong shu)) ;~".
• Adding a wildcard symbol may retrieve word variants: doing pin lens ((china ren) OR (china loren)) wong john ((wong siu) or (cong shu)) ;*.