Perhaps you should try some spelling variations:
cheng han » chen hao
yang yang » wang yang, wang yan
wing yan » wang yan, wing ian, wing tan
yang yun » yang jun, tang yun, yang yue
kai hong » bai chong, hai phong, wai hoong
hong sau » wong sau, hong paul, kong sar
yang xi » yang di, yang yi, yang jui
han kai » tan kai, shang kai, yuan kai

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: wing yan ((((yang yun) OR (yang yang))) OR (yang xi)) cheng han kai hong sau ;~.
• Adding a wildcard symbol may retrieve word variants: wing yan ((((yang yun) or (yang yang))) or (yang xi)) cheng han kai hong sau ;*.