Perhaps you should try some spelling variations:
dung xiaoping » deng xiaoping, huang xiaoting, huang xiaoming
wang xiaoping » wang xiaodong, deng xiaoping, wang xiaolin
chia daun » chia lan
daun sang » daun yang, du sang
sang minh » kang minah, anh minh, song min
minh dang » minh cong, mich dann
tan chia » tuan china, than china, can china

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