Perhaps you should try some spelling variations:
yeung kang » chung kang, leung tang
kang chen » chang chen, jane chen, kang han
china who » china what, china won
china why » china what, china won
yang jin » yang jie, yang jun, ying jin
tong hui » wang hui
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: yeung kang chen ((china who) OR (china why)) ((yang jin) OR (((yang di) OR (yang xi)))) tong hui ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yeung kang chen ((china who) OR (china why)) ((yang jin) or (((yang di) or (yang xi)))) tong hui ;~".
• Adding a wildcard symbol may retrieve word variants: yeung kang chen ((china who) OR (china why)) ((yang jin) or (((yang di) or (yang xi)))) tong hui ;*.