Perhaps you should try some spelling variations:
wang xiaoping » deng xiaoping, wang xiaolin, huang xiaoting
than china » tuan china, han china, wuhan china
dong yang » dong hoang, wang yang, yang yang
jie zhang » jia zhang, li zhang, bin zhang
zhang hai » zhang dai, shang hai, zhang han
von yang » von wang, von langs, dan yang

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