Perhaps you should try some spelling variations:
rural credits » rural credit, total credits
rating value » creating value, trading value, trading values
dual credit » rural credit, equal credit, total credit
value cong » value co
yang yang » wang yang, wang yan, wang yong
dong » doing, long, done

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

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