Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
yang yang » wang yan
chen ping » chen rong, chen yang, chen wang
yang hua » wang hua, yang hui, ying hua
ren ping » yuen ping, fun ping, he ping
von sam » von sa, von sap, von sach
sar » sara, star, saur

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 hua ((ren ping) OR (chen ping)) john ((((von sam) OR (von scham))) OR (kong sar)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang yang hua ((ren ping) OR (chen ping)) john ((((von sam) or (von scham))) or (kong sar)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang yang hua ((ren ping) OR (chen ping)) john ((((von sam) or (von scham))) or (kong sar)) ;*.