Perhaps you should try some spelling variations:
credit trading » credit training, credit rating, credit standing
trading risk » trading case, trading room, funding risk
hua credit » dual credit, a credit, du credit
risk cong » risk coping, risk among, risk along
nana yaa » nan yan, nanay a
nan ya » nan yan

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 (nana yaa)) hua credit trading risk cong shu ;~".
• Adding a wildcard symbol may retrieve word variants: dong ((nan ya) OR (nana yaa)) hua credit trading risk cong shu ;*.