Perhaps you should try some spelling variations:
yang guang » yang yang, yang liang
chen yong » chen rong, chen yang, zhen yong
yong john » young john, kong john, wong john
john wong » john song, john bonn
yan guan » gan guan, yihan guan, quan guan
yan yuan » fang yuan, yan clan, yan kun
hua chen » jui chen, yu chen, a chen
wong sam » wong sau, wong lai, kong sar
nan yan » nan ya, wang yan, qian yan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: lang ((((yang guang) or (yan guan))) or (((yan yuan) or (nan yan)))) hua chen yong john wong sam ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang ((((yang guang) OR (yan guan))) OR (((yan yuan) OR (nan yan)))) hua chen yong john wong sam ;.
• Adding a wildcard symbol may retrieve word variants: lang ((((yang guang) or (yan guan))) or (((yan yuan) or (nan yan)))) hua chen yong john wong sam ;*.