Perhaps you should try some spelling variations:
total credits » total credit, tax credits
trading risk » trading case, trading room, funding risk
risk coping » risk pooling
hua credit » dual credit, a credit, du credit
coping shu » cong shu
dong yang » dong hoang, yang yang, dan yang
wang yang » wang yan, wang liang, wang yanling

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) OR (wang yang)) ya ((hua credit) OR (total credits)) trading risk coping shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong yang) OR (wang yang)) ya ((hua credit) or (total credits)) trading risk coping shu ;~".
• Adding a wildcard symbol may retrieve word variants: ((dong yang) OR (wang yang)) ya ((hua credit) or (total credits)) trading risk coping shu ;*.