Perhaps you should try some spelling variations:
xiaodong thang » xiaotong zhang, xiaoyang tang
xiaodong huang » xiaotong zhang
china yang » china ying, china wang, china chang
yang yang » wang yang, wang yan
yang hong » wang hong, yang hongli, quang hong
hong ng » hong kong, hong jong, hong hong
ng tan » hong tan, wing tan
wang » wing, wan

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 OR lang) ((xiaodong thang) OR (xiaodong huang)) china yang yang hong ng tan ;~.
• Adding a wildcard symbol may retrieve word variants: (wang or lang) ((xiaodong thang) or (xiaodong huang)) china yang yang hong ng tan ;*.