Perhaps you should try some spelling variations:
lang xiaodong » wang xiaodong, wang xianodong, lin xiaodong
tuan china » wuhan china, can china, taiwan china
than china » han china, wuhan china, can china
yang cindy » yang mind
sang minh » kang minah, anh minh, song min
hong hai » shang hai, zhong tai, dang hai

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: lang xiaodong ((tuan china) OR (than china)) daun ((sang minh) OR (yang cindy)) hong hai ;~.
• Adding a wildcard symbol may retrieve word variants: lang xiaodong ((tuan china) or (than china)) daun ((sang minh) or (yang cindy)) hong hai ;*.