Perhaps you should try some spelling variations:
xiaoping tan » xiaoyang tang, xiaojing a, xiaoping _
sang minh » kang minah, anh minh, song min
minh data » mind data, fish data, mesh data
tan chia » tuan china, than china, can china
chia tan » chia lan, chen tan, chia wen
tan sang » tan yang, tang tang, tan hong
deng » den, eng, dung

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 xiaoping tan chia tan sang minh data (hai OR hari) ;~.
• Adding a wildcard symbol may retrieve word variants: deng xiaoping tan chia tan sang minh data (hai or hari) ;*.