Perhaps you should try some spelling variations:
wang xiaojing » wang xiaoping, wang xiaobing, wang xiaodong
part china » parks china, east china, market china
hurt china » out china, must china
minh data » mind data, mesh data, onh data
fish data » mesh data, rich data, fishery data
dan sang » dan yang, dan dana, dan qing

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 xiaojing ((part china) OR (hurt china)) dan sang ((minh data) OR (fish data)) hari ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang xiaojing ((part china) or (hurt china)) dan sang ((minh data) OR (fish data)) hari ;~".
• Adding a wildcard symbol may retrieve word variants: wang xiaojing ((part china) or (hurt china)) dan sang ((minh data) OR (fish data)) hari ;*.