Perhaps you should try some spelling variations:
deng xiaoyang » deng xiaoping, tang xiaoyang
xiaoyang tang » xiaoyan deng
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 tang chia tan ((yang yun) OR (yang fan)) data (hai OR hari) ;~.
• Adding a wildcard symbol may retrieve word variants: deng xiaoyang tang chia tan ((yang yun) or (yang fan)) data (hai or hari) ;*.