Perhaps you should try some spelling variations:
than china » tuan china, han china, wuhan china
yang jin » yang jie, yang jun, ying jin
yang jui » yang judy, yang di, yang xi
tan hua » tuan hua, wang hua, tan chia
yan jiu » yang jie, pang jiu
won sau » wong sau, wong sam, wong siu
wang » wing, wan, lang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang yan ((tan hua) or (than china)) gene ((((yan jiu) or (yang jin))) or (yang jui)) won sau ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan ((tan hua) OR (than china)) gene ((((yan jiu) OR (yang jin))) OR (yang jui)) won sau ;.
• Adding a wildcard symbol may retrieve word variants: wang yan ((tan hua) or (than china)) gene ((((yan jiu) or (yang jin))) or (yang jui)) won sau ;*.