Perhaps you should try some spelling variations:
den xiaoping » deng xiaoping, wang xiaoping, _ xiaoping
jane chen » jean chen, jie chen, kang chen
tan chen » tan cheng, ta chen, jean chen
wei ying » wei ming, wei yang, wei yiming
jin data » main data, own data, can data
von data » loan data, von daten, von daf

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 chen) OR (jane chen)) wei ying ((jin data) OR (von data)) (hai OR hari) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "den xiaoping ((tan chen) OR (jane chen)) wei ying ((jin data) or (von data)) (hai or hari) ;~".
• Adding a wildcard symbol may retrieve word variants: den xiaoping ((tan chen) OR (jane chen)) wei ying ((jin data) or (von data)) (hai or hari) ;*.