Perhaps you should try some spelling variations:
credit training » credit trading, credit rationing, credit rating
training value » trading value, obtaining value, driving value
value cong » value co, value closing, value change
yang yang » wang yang, wang yan
a equal » _ equal, can equal, e equals
6 equal » _ equal, 6.2 equal, e equals

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 doing) sin) OR (yang yang)) ((a equal) OR (6 equal)) credit training value cong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((dong or doing) sin) or (yang yang)) ((a equal) OR (6 equal)) credit training value cong shu ;~".
• Adding a wildcard symbol may retrieve word variants: (((dong or doing) sin) or (yang yang)) ((a equal) OR (6 equal)) credit training value cong shu ;*.