Perhaps you should try some spelling variations:
rating value » creating value, trading value, lasting value
dual credit » rural credit, deals credit, equal credit
wang yang » wang yan, wang liang, wang yanling
yang yang » wang yan
value co » value _, value a
a dual » _ dual
co shu » cong shu

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: (((dong OR done) sin) OR (((yang yang) OR (wang yang)))) a dual credit rating value co shu ;~.
• Adding a wildcard symbol may retrieve word variants: (((dong or done) sin) or (((yang yang) or (wang yang)))) a dual credit rating value co shu ;*.