Perhaps you should try some spelling variations:
yang yang » wang yang
cheng tan » cheng han, chen tan, cheng guan
yang yun » yang jun, tang yun, yang yue
hong sau » hong paul, kong sar, hong seo
wong sau » wong sam, wong siu, wong shiu
yang xi » yang di, yang yi, yang jui
tan kai » tan kah, yuan kai
wang » wing, wan, lang

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 yan ((((yang yun) OR (yang yang))) OR (yang xi)) cheng tan kai ((hong sau) OR (wong sau)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan ((((yang yun) or (yang yang))) or (yang xi)) cheng tan kai ((hong sau) OR (wong sau)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan ((((yang yun) or (yang yang))) or (yang xi)) cheng tan kai ((hong sau) OR (wong sau)) ;*.