Perhaps you should try some spelling variations:
credit trading » credit training, credit rating, credit standing
trading value » trading volume, trading volumes, creating value
done using » line using, move using
value cong » value co, value closing, value change
wang yong » wang yang, wang hyoung, wang yan
done sin » dong sin, done so, done fix

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((done sin) OR (done using))) OR (wang yong)) a rural credit trading value cong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((done sin) OR (done using))) or (wang yong)) a rural credit trading value cong shu ;~".
• Adding a wildcard symbol may retrieve word variants: ((((done sin) OR (done using))) or (wang yong)) a rural credit trading value cong shu ;*.