Perhaps you should try some spelling variations:
yang guang » yang yang, yang liang
yang john » young john, king john, yang jin
john wong » john song, john bonn
yan xuan » yan yuan, wang xuan, yan clan
yan guan » gan guan, yan yuan, yihan guan
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 (yan guan))) OR (yang guang)) vu irene yang john wong sam ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((((yan xuan) or (yan guan))) or (yang guang)) vu irene yang john wong sam ;*.