Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
yang than » yang dean, yang fan
china wen » chia wen, ching wen, china women
china won » china women, china wang, china who
yang jie » yang jin, yang di, yang jui
ying jin » yang jin, jing ji
yan jiu » 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 than ((china wen) OR (china won)) ((yan jiu) OR (((yang jie) OR (ying jin)))) cong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang than ((china wen) OR (china won)) ((yan jiu) or (((yang jie) or (ying jin)))) cong shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang than ((china wen) OR (china won)) ((yan jiu) or (((yang jie) or (ying jin)))) cong shu ;*.