Perhaps you should try some spelling variations:
china under » china und
guan china » tuan china, wuhan china, human china
wang gan » wang yan, wang ban, wang yang
wang dan » wang yan, wang ban, wang yidan
wong sau » wong sam, wong siu, wong shiu
yang xi » yang yi, yang jui
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 gan) OR (wang dan)) guan china under ((yang xi) OR (yang di)) ((von sam) OR (wong sau)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang gan) OR (wang dan)) guan china under ((yang xi) or (yang di)) ((von sam) or (wong sau)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang gan) OR (wang dan)) guan china under ((yang xi) or (yang di)) ((von sam) or (wong sau)) ;*.