Perhaps you should try some spelling variations:
rating value » creating value, trading value, trading values
dual credit » rural credit, equal credit, rural credits
value cong » value co
yang yang » wang yang, wang yan
wang yong » wang yang, wang hyoung, wang yan
a dual » _ dual
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) OR (wang yong)))) a dual credit rating value cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong sin) OR (((yang yang) OR (wang yong)))) a dual credit rating value cong shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong sin) or (((yang yang) OR (wang yong)))) a dual credit rating value cong shu ;*".