Perhaps you should try some spelling variations:
deng xiaoyang » deng xiaoping
tang xiaoyang » wang xiaochang, zhang xiaoyong, wang xiaodong
tang chia » tan chia, hang china, tang chun
chia tan » chia lan, chen tan, chia wen
yang yun » yang jun, tang yun, yang yue
yang fan » zhang fan, yang dean, yang 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: ((deng xiaoyang) OR (tang xiaoyang)) tang chia tan ((yang yun) OR (yang fan)) data (hai OR hari) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((deng xiaoyang) OR (tang xiaoyang)) tang chia tan ((yang yun) or (yang fan)) data (hai or hari) ;~".
• Adding a wildcard symbol may retrieve word variants: ((deng xiaoyang) OR (tang xiaoyang)) tang chia tan ((yang yun) or (yang fan)) data (hai or hari) ;*.