Perhaps you should try some spelling variations:
total credits » total credit, tax credits
trading risk » trading case, trading room, funding risk
hua credit » dual credit, a credit, du credit
dong yang » dong hoang, wang yang, yang yang
risk cong » risk coping, risk among, risk along
yang ya » yang yao, yang yi, yang ka

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong yang ya ((hua credit) or (total credits)) trading risk cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yang ya ((hua credit) OR (total credits)) trading risk cong shu ;.
• Adding a wildcard symbol may retrieve word variants: dong yang ya ((hua credit) or (total credits)) trading risk cong shu ;*.