Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
yang xuan » wang xuan, yang guang, yang dean
chen wong » chen rong, chen wang, chen yang
chen yong » chen rong, chen yang, zhen yong
xuan zhu » xuan thuy
wong sam » wong sau, wong lai, wong max
von sam » von sa, von sap, von scham
sar » sara, star, saur

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang xuan zhu ((chen wong) OR (chen yong)) john ((((wong sam) or (von sam))) or (kong sar)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang xuan zhu ((chen wong) OR (chen yong)) john ((((wong sam) OR (von sam))) OR (kong sar)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang xuan zhu ((chen wong) OR (chen yong)) john ((((wong sam) or (von sam))) or (kong sar)) ;*".