Perhaps you should try some spelling variations:
wang xiaoping » wang xiaodong, deng xiaoping, wang xiaolin
changes hari » changes a, changes asia, changes can
changes arab » exchanges arab, changes ahead, changes great
wuhan china » tuan china, yunnan china
wang jing » wang ning, wang liang, wang yang
wen jing » chen jing, zeng jing, wen ein

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: wang xiaoping wuhan china ((wen jing) OR (wang jing)) ii ((changes hari) OR (changes arab)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang xiaoping wuhan china ((wen jing) or (wang jing)) ii ((changes hari) OR (changes arab)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang xiaoping wuhan china ((wen jing) or (wang jing)) ii ((changes hari) OR (changes arab)) ;*.