Perhaps you should try some spelling variations:
den xiaoping » deng xiaoping, wang xiaoping, _ xiaoping
tan cheng » tang zheng, yuan cheng, tan hong
jane chen » jean chen, jie chen, kang chen
wei yang » pei yang, wei wang, wei yang's
yang jie » yang jin, yang di, yang jui
jie data » life data, file data, line data

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 cheng) OR (jane chen)) wei yang jie data (hai OR hari) ;~.
• Adding a wildcard symbol may retrieve word variants: den xiaoping ((tan cheng) or (jane chen)) wei yang jie data (hai or hari) ;*.