Perhaps you should try some spelling variations:
credits trading » credit trading, credits creating, credit rating
rural credits » rural credit, total credits
trading value » trading volume, trading volumes, creating value
value cong » value co, value closing, value change
long span » long han
long sin » dong sin, long run, long did

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: ((((long sin) OR (long span))) OR (wang yanling)) a rural credits trading value cong shu ;~.
• Adding a wildcard symbol may retrieve word variants: ((((long sin) or (long span))) or (wang yanling)) a rural credits trading value cong shu ;*.