Perhaps you should try some spelling variations:
credit training » credit trading, credit rationing, credit rating
training case » training based, training cost, training can
dong yang » dong hoang, wang yang, yang yang
case cong » case cost
dong nan » dong sin, dong bin, dong cao
a credit » bad credit
ya a » a a, y a, ye a

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong nan) or (dong yang)) ya a credit training case cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong nan) OR (dong yang)) ya a credit training case cong shu ;*.