Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
dean chan » jean chen
chan kang » chung kang, chan eng, chan fong
zhang han » zhang fan, zhang yan, zhang hanmo
yong jui » yang jui, yang jun, yong suk
yong cai » dong cao, yong c, yong wah
kang han » kang chen, kong hang, dang hai

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 yang dean chan kang ((yong jui) OR (yong cai)) ((kang han) OR (zhang han)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang dean chan kang ((yong jui) or (yong cai)) ((kang han) OR (zhang han)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang dean chan kang ((yong jui) or (yong cai)) ((kang han) OR (zhang han)) ;*.