Perhaps you should try some spelling variations:
sudan chen » sudan ch
chen yulan » chen yugang, chen yulu, chen yun
yulan wang » yuan wang, yan wang
yan sudan » kano sudan, yan guan, yan yuan
wang yang » wang yan, wang liang, wang yanling
yang jin » yang jie, yang jun, ying jin
sar » sara, star, saur

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: yan sudan chen yulan wang yang jin ((song shin) OR (kong sar)) ;~.
• Adding a wildcard symbol may retrieve word variants: yan sudan chen yulan wang yang jin ((song shin) or (kong sar)) ;*.