Perhaps you should try some spelling variations:
than china » tuan china, han china, wuhan china
china hall » china fall, china hello, china small
duong van » cong van, duong anh
yang july » yang judy, yang jui, yang jun
van than » van thanh, van phan, van ham
yang yi » yang xi, yang jui
wang » wing, wan, lang

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 than china hall ((((yang di) OR (yang yi))) OR (yang july)) wang hua ;~.
• Adding a wildcard symbol may retrieve word variants: duong van than china hall ((((yang di) or (yang yi))) or (yang july)) wang hua ;*.