Perhaps you should try some spelling variations:
gang gong » gongs gong, gang sung, gong gang
gong shiu » wong shiu, cong shu, gong si
wing tan » wing ian, liang tan, hong tan
dong di » dong sin
yan liu » yang lin
yan jiu » yang jie, yang jin, pang jiu
xu gang » yu gang, zum gang, liu gang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wing tan) or (dong di)) wang ((yan liu) or (yan jiu)) xu gang gong shiu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wing tan) OR (dong di)) wang ((yan liu) OR (yan jiu)) xu gang gong shiu ;*.