Perhaps you should try some spelling variations:
yan guang » yang guang, gan guan, yan liang
hua irene » hua ren
ping john » king john, kong john, wong john
yan guan » gan guan, yan yuan, yang guang
wong sam » wong sau, wong lai, von sam
wang » wing, wan, lang
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: wang ((yan guang) OR (yan guan)) hua irene ping john ((wong sam) OR (kong sar)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan guang) OR (yan guan)) hua irene ping john ((wong sam) or (kong sar)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yan guang) OR (yan guan)) hua irene ping john ((wong sam) or (kong sar)) ;*.