Perhaps you should try some spelling variations:
kang chen » chang chen, jane chen, kang han
john wong » john song, john bonn
tan ying » fan ying, tan yang, tan yong
ran ying » fan ying, jin ying, gao ying
yan han » man han, yan zhang, kang han
wong a » wrong a, wong _, kong a
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 han) OR (kang chen)) run ((tan ying) OR (ran ying)) john wong a ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((yan han) or (kang chen)) run ((tan ying) or (ran ying)) john wong a ;*.