Perhaps you should try some spelling variations:
dual credit » rural credit, deals credit, equal credit
hua credit » a credit, ida credit, eu credit
costs cong » costs along, costs among, costs cost
wang gang » wang yang, wang liang, wang yan
du credit » de credit, 2 credit
gang yao » yang yao, wang yan, ganga ya

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang gang yao ((((hua credit) or (du credit))) or (dual credit)) trading costs cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang gang yao ((((hua credit) OR (du credit))) OR (dual credit)) trading costs cong shu ;.
• Adding a wildcard symbol may retrieve word variants: wang gang yao ((((hua credit) or (du credit))) or (dual credit)) trading costs cong shu ;*.