Perhaps you should try some spelling variations:
than china » tuan china, han china, wuhan china
wang yang » wang yan, wang liang, wang yanling
tan chia » tuan china, can china, dan china
jiu cong » li cong
cong hui » tong hui, gong hui, cong shu
tan hua » tuan 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: wang yang ((((tan hua) OR (wang hua))) OR (((tan chia) OR (than china)))) ren yan jiu cong hui ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang ((((tan hua) OR (wang hua))) or (((tan chia) or (than china)))) ren yan jiu cong hui ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang ((((tan hua) OR (wang hua))) or (((tan chia) or (than china)))) ren yan jiu cong hui ;*.