Perhaps you should try some spelling variations:
tran china » tuan china, than china, trade china
china hall » china fall, china hello, china small
duong van » cong van, duong anh
zhang wei » zhen wei
van tran » van thanh, van phan
yang jui » yang judy, yang yi
wang hui » wang hua, wang zhi, wang wei
yang xi » yang yi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: duong van tran china hall ((((yang xi) or (yang jui))) or (yang di)) ((wang hui) or (zhang wei)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: duong van tran china hall ((((yang xi) OR (yang jui))) OR (yang di)) ((wang hui) OR (zhang wei)) ;.
• Adding a wildcard symbol may retrieve word variants: duong van tran china hall ((((yang xi) or (yang jui))) or (yang di)) ((wang hui) or (zhang wei)) ;*.