Perhaps you should try some spelling variations:
den xiaoping » deng xiaoping, wang xiaoping, _ xiaoping
xiaoping tan » xiaoyang tang, xiaojing a, xiaoping _
tan chia » tuan china, than china, can china
chia wen » china won, ching wen, asia wen
wen yang » wei yang, wen wang, chen yang
von data » loan data, von daten, own 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 chia wen yang ((von data) OR (von daf)) (hai OR hari) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "den xiaoping tan chia wen yang ((von data) OR (von daf)) (hai or hari) ;~".
• Adding a wildcard symbol may retrieve word variants: den xiaoping tan chia wen yang ((von data) OR (von daf)) (hai or hari) ;*.