Perhaps you should try some spelling variations:
wang tuan » wang yuhan, wang yan, anh tuan
wang xuan » wang xiuyan, wang xueman, wang yuhan
wong john » wrong john, kong john, longo john
dan wong » dan con, dan qing, dan work
hua dan » hua ban
von sa » von sam, von sap, von sl
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 ((((wang tuan) or (wang hua))) or (wang xuan)) hua dan wong john ((von sa) or (kong sar)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((((wang tuan) OR (wang hua))) OR (wang xuan)) hua dan wong john ((von sa) OR (kong sar)) ;.
• Adding a wildcard symbol may retrieve word variants: wang ((((wang tuan) or (wang hua))) or (wang xuan)) hua dan wong john ((von sa) or (kong sar)) ;*.