Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
yan wang » yuan wang, qian wang, yan liang
tuan hua » tan hua, tuan vu, yuan hui
yang jun » yang jui, pang jun, yang jin
wang lin » wang li, wang qin, yang lin
wong yue » wang yue, hong yu
dan hua » tan hua, wang hua, dong hua

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: ((yan wang) OR (yang yang)) ((dan hua) OR (tuan hua)) rene ((yang jun) OR (wang lin)) wong yue ;~.
• Adding a wildcard symbol may retrieve word variants: ((yan wang) or (yang yang)) ((dan hua) or (tuan hua)) rene ((yang jun) or (wang lin)) wong yue ;*.