Perhaps you should try some spelling variations:
gung tang » gung thang, leung tang
tang tang » taizong tang
china why » china who, china what
china won » china women, china wang, china who
yang jin » yang jie, yang jun, ying jin
wang hui » wang hua, wang zhi, wang wei
yang xi » yang yi, yang jui

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: gung tang tang ((china why) OR (china won)) ((yang jin) OR (((yang xi) OR (yang di)))) wang hui ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "gung tang tang ((china why) OR (china won)) ((yang jin) or (((yang xi) or (yang di)))) wang hui ;~".
• Adding a wildcard symbol may retrieve word variants: gung tang tang ((china why) OR (china won)) ((yang jin) or (((yang xi) or (yang di)))) wang hui ;*.