Perhaps you should try some spelling variations:
china won » china women, china wang, china why
china who » china why, china what
tang han » kang han, tang chun, tang tang
yang jun » yang jui, pang jun, yang judy
yang jin » yang jie, ying jin, shang jin
tong hui » wang hui
leung » leong, lung, yeung

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: leung tang han ((china won) OR (china who)) ((yang jun) OR (yang jin)) tong hui ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "leung tang han ((china won) OR (china who)) ((yang jun) or (yang jin)) tong hui ;~".
• Adding a wildcard symbol may retrieve word variants: leung tang han ((china won) OR (china who)) ((yang jun) or (yang jin)) tong hui ;*.