Perhaps you should try some spelling variations:
xiaoping tuan » xinping guan
den xiaoping » deng xiaoping, wang xiaoping, _ xiaoping
tuan china » wuhan china, can china, taiwan china
china tan » china top, china two, china taiwan
yang yun » yang jun, tang yun, yang yang
yang yue » wang yue, yang jui, yang yi
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: den xiaoping tuan china tan ((((yang yun) OR (yang yue))) OR (yang fan)) data (hai OR hari) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "den xiaoping tuan china tan ((((yang yun) OR (yang yue))) or (yang fan)) data (hai or hari) ;~".
• Adding a wildcard symbol may retrieve word variants: den xiaoping tuan china tan ((((yang yun) OR (yang yue))) or (yang fan)) data (hai or hari) ;*.