Perhaps you should try some spelling variations:
wang xiaoping » wang xiaodong, deng xiaoping, wang xiaolin
wuhan china » tuan china, yunnan china
than china » tuan china, han china, can china
sang minh » kang minah, anh minh, song min
minh dang » minh cong, mich dann
du sang » du yang
hai » hadi, haji, hari

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang xiaoping ((than china) or (wuhan china)) du sang minh dang hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang xiaoping ((than china) OR (wuhan china)) du sang minh dang hai ;*.