Perhaps you should try some spelling variations:
equal credit » equity credit, rural credit, total credit
trading cost » trading costs, training cost, trading case
dual credit » rural credit, deals credit, du credit
cost coping » post coping, port coping, cost computing
coping shu » cong shu
dong yang » dong hoang, wang yang, yang yang
yang yao » yang yang, wang yan, yang yi

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 yao ((dual credit) or (equal credit)) trading cost coping shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yang yao ((dual credit) OR (equal credit)) trading cost coping shu ;*.