Perhaps you should try some spelling variations:
china data » china update, chinese data
wang hong » wang yong, wang hyoung, wang lihong
china dan » china den, china des, china due
hong can » hong tan, congo can, hong gang
yang jui » yang judy, yang di, yang yi
kang han » kang chen, kong hang, zhang han
yang xi » yang di, yang yi

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 can ((china dan) OR (china data)) ((yang xi) OR (yang jui)) kang han ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang hong can ((china dan) OR (china data)) ((yang xi) or (yang jui)) kang han ;~".
• Adding a wildcard symbol may retrieve word variants: wang hong can ((china dan) OR (china data)) ((yang xi) or (yang jui)) kang han ;*.