Perhaps you should try some spelling variations:
than china » tuan china, han china, wuhan china
yang yang » wang yang, wang yan
wang vang » wang yang, trang vang, wang liang
viet dans » vie dans, et dans
wang ban » wang yan, wang dan, wang yang
tan chia » tuan china, can china, dan china
dans hai » dang hai, dans la

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: ((yang yang) OR (wang ban)) ((tan chia) OR (than china)) wang vang viet dans hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang yang) or (wang ban)) ((tan chia) OR (than china)) wang vang viet dans hai ;~".
• Adding a wildcard symbol may retrieve word variants: ((yang yang) or (wang ban)) ((tan chia) OR (than china)) wang vang viet dans hai ;*.