Perhaps you should try some spelling variations:
den xiaoping » deng xiaoping, wang xiaoping, _ xiaoping
yuan cheng » yuan chang, huang cheng, yu cheng
tan cheng » tang zheng, tan hong, tan eng
tan chen » ta chen, jane chen, jean chen
wei yang » pei yang, wei wang, wei yang's
yang jin » yang jie, yang jun, ying jin
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) OR (tan cheng))) or (yuan cheng)) wei yang jin data (hai or hari) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: den xiaoping ((((tan chen) OR (tan cheng))) OR (yuan cheng)) wei yang jin data (hai OR hari) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "den xiaoping ((((tan chen) OR (tan cheng))) or (yuan cheng)) wei yang jin data (hai or hari) ;*".