Perhaps you should try some spelling variations:
china loren » china lehren, china korea, china more
wang wing » wang jing, wang ning, wang liang
china why » china who, china what, china won
yang yang » wang yang, wang yan
wing sun » liang sun, cong sun, nina sun
yang yao » wang yan, yang yi, yang fan
hong yu » wong yue

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: wang wing sun ((china loren) OR (china why)) ((yang yao) OR (yang yang)) hong yu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang wing sun ((china loren) or (china why)) ((yang yao) OR (yang yang)) hong yu ;~".
• Adding a wildcard symbol may retrieve word variants: wang wing sun ((china loren) or (china why)) ((yang yao) OR (yang yang)) hong yu ;*.