Perhaps you should try some spelling variations:
yuan kang » yuan chang, chan kang, yuan kai
yuan wang » yan wang, yuan chang, qian wang
chen yong » chen rong, chen yang, zhen yong
yong john » young john, kong john, wong john
john song » john wong, john bonn, john ngosong
song thin » song shin, song jin, song min

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: ((wan OR wing) OR lang) fang ((yuan kang) OR (yuan wang)) chen yong john song thin ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wan or wing) or lang) fang ((yuan kang) OR (yuan wang)) chen yong john song thin ;~".
• Adding a wildcard symbol may retrieve word variants: ((wan or wing) or lang) fang ((yuan kang) OR (yuan wang)) chen yong john song thin ;*.