Perhaps you should try some spelling variations:
than china » tuan china, han china, wuhan china
wang hong » wang yong, wang hyoung, wang lihong
hong than » hong tan, long thanh, hong hai
china dan » china den, china data, china des
yang jin » yang jun, ying jin, shang jin
yang jie » yang jui, yang xi, yang yi
kang hay » eang hay, kang han, dang hai

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: wang hong than china dan ((yang jin) OR (((yang jie) OR (yang di)))) kang hay ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang hong than china dan ((yang jin) or (((yang jie) OR (yang di)))) kang hay ;~".
• Adding a wildcard symbol may retrieve word variants: wang hong than china dan ((yang jin) or (((yang jie) OR (yang di)))) kang hay ;*.