Perhaps you should try some spelling variations:
credit training » credit trading, credit rationing, credit rating
training value » trading value, obtaining value, driving value
dual credit » rural credit, deals credit, equal credit
wang yang » wang yan, wang liang, wang yanling
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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((dong or done) sin) or (wang yang)) a dual credit training value co shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((dong OR done) sin) OR (wang yang)) a dual credit training value co shu ;*.