Perhaps you should try some spelling variations:
tuan china » wuhan china, can china, taiwan china
thanh van » thanh dam, thanh vu
yang yang » wang yang, wang yan
jui zhang » li zhang, jia zhang, jie zhang
zhang hai » zhang dai, shang hai, zhang han
wing ian » wing tan, twinn ian, wing sun
tan yang » dan yang, tan ying, tan yong

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: wing ian ((thanh van) OR (tuan china)) ((tan yang) OR (yang yang)) jui zhang hai ;~.
• Adding a wildcard symbol may retrieve word variants: wing ian ((thanh van) or (tuan china)) ((tan yang) or (yang yang)) jui zhang hai ;*.