Perhaps you should try some spelling variations:
wang xiaoping » wang xiaodong, deng xiaoping, wang xiaolin
wang daoping » wang danning, wang xiaobing, wang yanling
tan chia » tuan china, than china, can china
tan yang » dan yang, tan yong, tao yang
tan ying » fan ying, ran ying, tan yong
dang » dan, lang, dans
hai » hadi, haji, hari

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