Perhaps you should try some spelling variations:
wang xiaotong » wang xiaodong, wang xianodong, wang xiaoping
zhang china » hang china, change china, zhejiang china
china chang » chin chang, china zhang, china changqi
chang wang » chang ann, chang won, hong wang
wang yang » wang yan, wang liang, wang yanling
yang dang » yang yang, yang guang, yang liang

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 zhang china chang wang yang dang (hai OR hadi) ;~.
• Adding a wildcard symbol may retrieve word variants: wang xiaotong zhang china chang wang yang dang (hai or hadi) ;*.