Perhaps you should try some spelling variations:
tuan china » wuhan china, can china, taiwan china
wang yang » wang yan, wang liang, wang yanling
tuan hua » tan hua, yuan hui
wong sau » wong sam, wong siu, wong shiu
tuan vu » thanh vu
yan jiu » yang jie, yang jin, pang jiu
yang xi » yang di, yang yi, yang jui

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 yang ((((tuan hua) OR (tuan vu))) OR (tuan china)) rein ((yan jiu) OR (yang xi)) wong sau ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang ((((tuan hua) OR (tuan vu))) or (tuan china)) rein ((yan jiu) or (yang xi)) wong sau ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang ((((tuan hua) OR (tuan vu))) or (tuan china)) rein ((yan jiu) or (yang xi)) wong sau ;*.