Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
yang yang » wang yan
sang minh » kang minah, anh minh, song min
chang min » zhang ming, chang mae, chan ming
yang liu » yang li, yang lin, yang di
wong sau » wong sam, wong siu, wong shiu
liu liu » liu li, liu lili, lili liu
von sam » von sa, von sap, von scham

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 yang liu liu ((sang minh) OR (chang min)) ((wong sau) OR (von sam)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yang yang liu liu ((sang minh) or (chang min)) ((wong sau) or (von sam)) ;*.