Perhaps you should try some spelling variations:
china wang » china yang, china chang, china zhang
wang yang » wang yan, wang liang, wang yanling
chan wang » chen wang, chan kang, chan fong
yang yan » yang yang, wang yan, yang fan
yu cheng » _ cheng
chan eng » chan fong, chan kang, chan ming
yu chen » yi chen, yulu chen, jui chen
chung h » chun h, chung _, chung hee

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 yan ((yu chen) OR (yu cheng)) ((((chan wang) OR (chan eng))) OR (china wang)) chung h ;~.
• Adding a wildcard symbol may retrieve word variants: wang yang yan ((yu chen) or (yu cheng)) ((((chan wang) or (chan eng))) or (china wang)) chung h ;*.