Perhaps you should try some spelling variations:
china ahead » china asean, china already, china agenda
yeung tang » leung tang
tang ghana » change ghana
china hea » ching hea, china how, china has
yang jin » yang jie, ying jin, shang jin
yang jun » yang jui, pang jun, yang judy
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 tang ghana ((china hea) OR (china ahead)) ((yang jin) OR (yang jun)) tong hui ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yeung tang ghana ((china hea) OR (china ahead)) ((yang jin) or (yang jun)) tong hui ;~".
• Adding a wildcard symbol may retrieve word variants: yeung tang ghana ((china hea) OR (china ahead)) ((yang jin) or (yang jun)) tong hui ;*.