Perhaps you should try some spelling variations:
wang xiaoping » wang xiaodong, deng xiaoping, wang xiaolin
xiaoping yang » xiaoyang tang
zhang ming » zhang xin
ming hong » min hong, ming hung, ming kong
can zhen » can when, chen zhen, fang zhen
chen zhe » chen zhen, chen e
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: wang xiaoping yang ((can zhen) OR (chen zhe)) zhang ming hong hai ;~.
• Adding a wildcard symbol may retrieve word variants: wang xiaoping yang ((can zhen) or (chen zhe)) zhang ming hong hai ;*.