Perhaps you should try some spelling variations:
china chen » china shen, china china, china chang
yuan kang » yuan wang, yuan chang, yuan kai
chan kang » chung kang, chan eng, chan fong
wong yue » hong yu
wang yue » wang hua, wang yan, wang he
rong di » dong di, long did, among di
gong di » dong di, gong si, long did

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yuan kang) or (chan kang)) can china chen ((rong di) OR (gong di)) ((wong yue) or (wang yue)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yuan kang) OR (chan kang)) can china chen ((rong di) OR (gong di)) ((wong yue) OR (wang yue)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yuan kang) or (chan kang)) can china chen ((rong di) OR (gong di)) ((wong yue) or (wang yue)) ;".
• Adding a wildcard symbol may retrieve word variants: ((yuan kang) or (chan kang)) can china chen ((rong di) OR (gong di)) ((wong yue) or (wang yue)) ;*.