Perhaps you should try some spelling variations:
trading value » trading volume, trading volumes, creating value
equal credit » equity credit, rural credit, total credit
dual credit » rural credit, deals credit, du credit
wang yang » wang yan, wang liang, wang yanling
value co » value _, value a
co shu » cong shu

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((dong or done) sin) or (wang yang)) a ((dual credit) OR (equal credit)) trading value co shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((dong OR done) sin) OR (wang yang)) a ((dual credit) OR (equal credit)) trading value co shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((dong or done) sin) or (wang yang)) a ((dual credit) OR (equal credit)) trading value co shu ;*".