Perhaps you should try some spelling variations:
credit training » credit rationing, credit rating, credit granting
credit trading » credit rating, credit standing, credit creating
costs coping » costs keeping, costs china, costs timing
coping shu » cong shu
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
yang dual » yang dean, yang dali, yang du

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: dong yang yang dual ((credit trading) OR (credit training)) costs coping shu ;~.
• Adding a wildcard symbol may retrieve word variants: dong yang yang dual ((credit trading) or (credit training)) costs coping shu ;*.