Perhaps you should try some spelling variations:
yuan wang » yan wang, yuan kang, yuan chang
chen yang » chen rong
yuan kai » yuan kang, yuan fei, tan kai
chan eng » chan fong, chan kang, chan ming
wen wang » wei wang, chen wang, weng fang
wong yue » wang yue, hong yu
dr wong » dr ong, dr congo, dr kongo

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((((yuan kai) or (yuan wang))) or (chan eng)) can china ((chen yang) or (wen wang)) dr wong yue ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((yuan kai) OR (yuan wang))) OR (chan eng)) can china ((chen yang) OR (wen wang)) dr wong yue ;.
• Adding a wildcard symbol may retrieve word variants: ((((yuan kai) or (yuan wang))) or (chan eng)) can china ((chen yang) or (wen wang)) dr wong yue ;*.