Perhaps you should try some spelling variations:
chia chiang » china chang
chik chang » chin chang, china chang, chih hang
cheng han » chen hao
zhang zhi » zhong zhi, wang zhi, zhang wei
hong than » hong tan, long thanh, hong hai
yan yang » yang yang, yao yang, dan yang
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 yang ((chik chang) OR (chia chiang)) cheng han ((zhang zhi) OR (hong than)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yan yang ((chik chang) or (chia chiang)) cheng han ((zhang zhi) or (hong than)) ;*.