Perhaps you should try some spelling variations:
thanh van » thanh dam, thanh vu
chen yang » chen rong
lang yan » wang yan, wang yang, zhang yan
yuan hui » yuan fei, jaan hui, tuan hua
yang yao » yang yang, wang yan, yang yi
yao tong » jiao tong, yao yang, cho tong
tong hui » wang hui

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: lang yan ((thanh van) OR (yuan hui)) chen yang yao tong hui ;~.
• Adding a wildcard symbol may retrieve word variants: lang yan ((thanh van) or (yuan hui)) chen yang yao tong hui ;*.