Perhaps you should try some spelling variations:
yuan kang » yuan wang, yuan chang, chan kang
yang yang » wang yang, wang yan
juan rene » juan meng, juan rana
yang jie » yang jin, yang di, yang jui
yang lin » yang jin, wang lin, yang li
de juan » de jean
yan tin » yuan ting, yang jin

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 (yang yang)) de juan rene ((((yan tin) or (yang jie))) or (yang lin)) cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yuan kang) OR (yang yang)) de juan rene ((((yan tin) OR (yang jie))) OR (yang lin)) cong shu ;.
• Adding a wildcard symbol may retrieve word variants: ((yuan kang) or (yang yang)) de juan rene ((((yan tin) or (yang jie))) or (yang lin)) cong shu ;*.