Perhaps you should try some spelling variations:
credit trading » credit training, credit rating, credit standing
trading value » trading volume, trading volumes, creating value
dual credit » rural credit, deals credit, equal credit
value cong » value co, value closing, value change
wang yong » wang yang, wang hyoung, wang yan
done sin » dong sin, done using, done so
dong bin » dong sin, dong di, dann bin
a dual » _ dual

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

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