Perhaps you should try some spelling variations:
thanh china » than china, ghana china, han china
duong van » cong van, duong anh
van thanh » tran thanh, phan thanh, lam thanh
china all » china fall, china als, china small
yang july » yang judy, yang jun
yang jui » yang judy, yang di
lang hua » wang hua, wang hui, dong hua
yang xi » yang di
yang yi » yang di

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: duong van thanh china all ((((((yang jui) OR (yang xi))) OR (yang yi))) OR (yang july)) lang hua ;~.
• Adding a wildcard symbol may retrieve word variants: duong van thanh china all ((((((yang jui) or (yang xi))) or (yang yi))) or (yang july)) lang hua ;*.