Perhaps you should try some spelling variations:
credit training » credit trading, credit rationing, credit rating
training risk » trading risk, training crisis, defining risk
risk coping » risk pooling
hua credit » dual credit, a credit, du credit
coping shu » cong shu
dong nana » dong nan, dong yang

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 nana ((yaa OR yana) OR yala) hua credit training risk coping shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong nana ((yaa OR yana) or yala) hua credit training risk coping shu ;~".
• Adding a wildcard symbol may retrieve word variants: dong nana ((yaa OR yana) or yala) hua credit training risk coping shu ;*.