Perhaps you should try some spelling variations:
xiaotong change » xiaotong zhang
wang xiaotong » wang xiaodong, wang xianodong, wang xiaoping
dang hari » dang hai
fang jie » yang jie, tang jie, fang ke
yang jin » yang jie, yang jun, ying jin
how wen » how when, how we, how women
how web » how we, how well, how were

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 xiaotong change ((how wen) OR (how web)) ((fang jie) OR (yang jin)) dang hari ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang xiaotong change ((how wen) OR (how web)) ((fang jie) or (yang jin)) dang hari ;~".
• Adding a wildcard symbol may retrieve word variants: wang xiaotong change ((how wen) OR (how web)) ((fang jie) or (yang jin)) dang hari ;*.