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

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: leung tang hang ((china who) OR (china why)) ((yang jin) or (yang jie)) tong hui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: leung tang hang ((china who) OR (china why)) ((yang jin) OR (yang jie)) tong hui ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "leung tang hang ((china who) OR (china why)) ((yang jin) or (yang jie)) tong hui ;*".