Perhaps you should try some spelling variations:
xiaodong huang » xiaotong zhang
wan xiaodong » wang xiaodong, wang xianodong, han xiaorong
huang china » hang china, tuan china, huang chang
china does » china goes, china des, child does
sang minh » kang minah, anh minh, song min
yang jie » yang jin, yang di, yang jui

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: wan xiaodong huang china does ((yang jie) OR (sang minh)) dang (hai OR hadi) ;~.
• Adding a wildcard symbol may retrieve word variants: wan xiaodong huang china does ((yang jie) or (sang minh)) dang (hai or hadi) ;*.