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
wei ying » wei yang, wei yiming, wei qiang
wei ming » wei yiming, wei qiang, ie ming
jin data » main data, own data, von data

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 ying) OR (wei ming)) jin data (hai or hari) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: den xiaoping tan chen ((wei ying) OR (wei ming)) jin data (hai OR hari) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "den xiaoping tan chen ((wei ying) OR (wei ming)) jin data (hai or hari) ;*".