Perhaps you should try some spelling variations:
wang xiaotong » wang xiaodong, wang xianodong, wang xiaobing
wang xiaoping » wang xiaodong, deng xiaoping, wang xiaolin
zhang china » hang china, change china, zhejiang china
china wang » china yang, china chang, china zhang
wang yang » wang yan, wang liang, wang yanling
yang dang » yang yang, yang guang, yang liang

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 xiaotong) OR (wang xiaoping)) zhang china china wang yang dang (hai OR hadi) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang xiaotong) OR (wang xiaoping)) zhang china china wang yang dang (hai or hadi) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang xiaotong) OR (wang xiaoping)) zhang china china wang yang dang (hai or hadi) ;*.