Perhaps you should try some spelling variations:
than china » tuan china, han china, wuhan china
chen zeng » chen zheng, chen yang, chen ping
chen rong » chen yang
wing yan » wang yan, wing ian, wing tan
yan than » van thanh, yan zhang, yan clan
kai hong » bai chong, hai phong, wai hoong
ma hong » a hong, kia hong, tan hong

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: wing yan than china ((chen zeng) OR (chen rong)) ((ma hong) OR (kai hong)) seo ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wing yan than china ((chen zeng) OR (chen rong)) ((ma hong) or (kai hong)) seo ;~".
• Adding a wildcard symbol may retrieve word variants: wing yan than china ((chen zeng) OR (chen rong)) ((ma hong) or (kai hong)) seo ;*.