Perhaps you should try some spelling variations:
sudan chen » sudan ch
yuan chen » yuan cheng, yun chen, yuan chang
yuan wang » yan wang, yuan kang, yuan chang
wang jing » wang ning, wang liang, wang yang
wong shiu » wong siu, cong shu, song shin
jing jin » jing ji, ying jin, jing jia
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 ((yuan chen) OR (sudan chen)) yuan wang jing jin ((wong shiu) OR (kong sar)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yan ((yuan chen) OR (sudan chen)) yuan wang jing jin ((wong shiu) or (kong sar)) ;~".
• Adding a wildcard symbol may retrieve word variants: yan ((yuan chen) OR (sudan chen)) yuan wang jing jin ((wong shiu) or (kong sar)) ;*.