Perhaps you should try some spelling variations:
credit trading » credit training, credit rating, credit standing
trading risk » trading case, trading room, funding risk
dual credit » rural credit, deals credit, equal credit
risk cong » risk coping, risk among, risk along
nan yan » wang yan, qian yan, dan yang
nan ya » nana yaa

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "dong ((nan ya) OR (nan yan)) dual credit trading risk cong shu ;~".
• Adding a wildcard symbol may retrieve word variants: dong ((nan ya) OR (nan yan)) dual credit trading risk cong shu ;*.