Perhaps you should try some spelling variations:
wang xiaoping » wang xiaodong, deng xiaoping, wang xiaolin
xiaoping tan » xiaoyang tang, xiaojing a, xiaoping _
amin shang » amin hong, anming zhang
wang yang » wang yan, wang liang, wang yanling
shang hai » shang kai, dang hai, chang ha
tan chia » tuan china, than china, can china
tan yang » dan yang, tan ying, tan yong

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 tan chia ((wang yang) OR (tan yang)) amin shang hai ;~.
• Adding a wildcard symbol may retrieve word variants: wang xiaoping tan chia ((wang yang) or (tan yang)) amin shang hai ;*.