Perhaps you should try some spelling variations:
den xiaoping » deng xiaoping, wang xiaoping, _ xiaoping
xiaoping tan » xiaoyang tang, xiaojing a, xiaoping _
tan chen » tan cheng, ta chen, jane chen
chen wei » zhen wei, chen e
yang jie » yang jin, yang di, yang xi
yang jui » yang judy, yang di, yang xi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: den xiaoping tan chen wei ((yang jie) OR (yang jui)) data (hai or hari) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: den xiaoping tan chen wei ((yang jie) OR (yang jui)) data (hai OR hari) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "den xiaoping tan chen wei ((yang jie) OR (yang jui)) data (hai or hari) ;*".