Perhaps you should try some spelling variations:
yuan china » tuan china, yunnan china, wuhan china
china ren » china loren, china real, china reza
yan yuan » yan guan, fang yuan, nan yan
yang jui » yang judy, yang di, yang xi
cong seo » hong seo, cong shu, von seo
cong sun » cong shu, cong van, wing sun
yan jiu » yang jie, yang jin, pang jiu

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

• Performing a fuzzy search may retrieve terms with similar spellings: (wing or wan) yan yuan china ren ((yan jiu) or (yang jui)) ((cong seo) OR (cong sun)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wing OR wan) yan yuan china ren ((yan jiu) OR (yang jui)) ((cong seo) OR (cong sun)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wing or wan) yan yuan china ren ((yan jiu) or (yang jui)) ((cong seo) OR (cong sun)) ;".
• Adding a wildcard symbol may retrieve word variants: (wing or wan) yan yuan china ren ((yan jiu) or (yang jui)) ((cong seo) OR (cong sun)) ;*.