Perhaps you should try some spelling variations:
han china » hang china, than china, can china
yang jie » yang jin, yang di, yang jui
non same » non state, non frame, non sales
tan hua » tuan hua, wang hua, tan chia
yan jiu » yang jin, pang jiu
won sau » wong sau, wong sam, wong siu
wang » wing, wan, lang

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: wang hyoung ((tan hua) OR (han china)) ren ((yan jiu) OR (yang jie)) ((won sau) OR (non same)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang hyoung ((tan hua) or (han china)) ren ((yan jiu) OR (yang jie)) ((won sau) or (non same)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang hyoung ((tan hua) or (han china)) ren ((yan jiu) OR (yang jie)) ((won sau) or (non same)) ;*.