Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan, yang liang
ping john » king john, kong john, wong john
yan xuan » yan guan, yan yuan, wang xuan
vu irene » _ irene
wong sam » wong lai, von sam, wong max
wong sau » wong siu, wong shiu, wong lai
sar » sara, star, saur

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: wan ((yan xuan) OR (yang guang)) vu irene ping john ((((wong sam) OR (wong sau))) OR (kong sar)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan ((yan xuan) or (yang guang)) vu irene ping john ((((wong sam) OR (wong sau))) or (kong sar)) ;~".
• Adding a wildcard symbol may retrieve word variants: wan ((yan xuan) or (yang guang)) vu irene ping john ((((wong sam) OR (wong sau))) or (kong sar)) ;*.