Perhaps you should try some spelling variations:
wang xiaobing » wang xiaoping, wang xiaodong, wang xiaolin
wang daoping » wang xiaoping, wang danning, wang yanling
tuan china » wuhan china, can china, taiwan china
sang minh » kang minah, anh minh, song min
minh dang » minh cong, mich dann
tan chia » than china, can china, dan china
dan sang » dan yang, dan dana, dan qing
hai » hadi, haji, hari

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 daoping) OR (wang xiaobing)) ((tan chia) OR (tuan china)) dan sang minh dang hai ;~.
• Adding a wildcard symbol may retrieve word variants: ((wang daoping) or (wang xiaobing)) ((tan chia) or (tuan china)) dan sang minh dang hai ;*.