Perhaps you should try some spelling variations:
wang xiaojing » wang xiaoping, wang xiaodong, wang xiaolin
wang xiaobing » wang xiaoping, wang xiaodong, wang xiaolin
china dan » china den, china data, china des
qing minh » sang minh
minh data » mind data, fish data, mesh data
data hari » data sharing
dan qing » dan yang, der qing
4 china » 2 china

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang xiaojing) OR (wang xiaobing)) 4 china dan qing minh data hari ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang xiaojing) OR (wang xiaobing)) 4 china dan qing minh data hari ;*.