Perhaps you should try some spelling variations:
yang thanh » long thanh, van thanh
wang yang » wang yan, wang liang, wang yanling
kind john » king john, hinde john, und john
kong sara » kong sar
thanh vu » thanh van, thanh _
vu irene » _ irene
wong sau » wong sam, wong siu, wong shiu

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 thanh vu irene kind john ((wong sau) OR (kong sara)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yang thanh vu irene kind john ((wong sau) or (kong sara)) ;*.