Perhaps you should try some spelling variations:
yeung kang » chung kang, leung tang
china yang » china ying, china chang, china zhang
china wang » china chang, china zhang, china won
kang hang » kang han, kong hang
yang jun » pang jun, yang jin, yang judy
yang jui » yang judy, yang di, yang xi
tong hui » wang hui

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 hang ((china yang) OR (china wang)) ((yang jun) OR (yang jui)) tong hui ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yeung kang hang ((china yang) OR (china wang)) ((yang jun) or (yang jui)) tong hui ;~".
• Adding a wildcard symbol may retrieve word variants: yeung kang hang ((china yang) OR (china wang)) ((yang jun) or (yang jui)) tong hui ;*.