Perhaps you should try some spelling variations:
den xiaoping » deng xiaoping, wang xiaoping, _ xiaoping
xiaoping tan » xiaoyang tang, xiaojing a, xiaoping _
china chang » chin chang, china zhang, china changqi
china yang » china ying, china wang, china zhang
sang minh » kang minah, anh minh, song min
minh dang » minh cong, mich dann
chia le » china led, chia lan, chia wen

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