Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
yang john » young john, king john, yang jin
wong shiu » wong siu, cong shu, song shin
yan xuan » yan guan, yan yuan, wang xuan
vu irene » _ irene
wong sam » wong sau, wong lai, kong sar
wang » wing, wan, lang

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 ((yan xuan) OR (yang yang)) vu irene yang john ((wong shiu) OR (wong sam)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((yan xuan) or (yang yang)) vu irene yang john ((wong shiu) or (wong sam)) ;*.