Perhaps you should try some spelling variations:
than china » tuan china, han china, wuhan china
wen wang » wei wang, chen wang, weng fang
tan chia » tuan china, can china, dan china
wong sam » wong sau, wong lai, kong sar
wong siu » wong shiu, kong siu, wong sau
tan hua » tuan hua, wang hua, tan puay
yan jiu » yang jie, yang jin, pang jiu

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: wen wang ((tan hua) OR (((tan chia) OR (than china)))) ren yan jiu ((wong sam) OR (wong siu)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wen wang ((tan hua) or (((tan chia) OR (than china)))) ren yan jiu ((wong sam) or (wong siu)) ;~".
• Adding a wildcard symbol may retrieve word variants: wen wang ((tan hua) or (((tan chia) OR (than china)))) ren yan jiu ((wong sam) or (wong siu)) ;*.