Perhaps you should try some spelling variations:
training risk » trading risk, training visit, training work
training cost » training costs, training course, trading costs
equal credit » dual credit, rural credit, total credit
wan yan » wang yan, wang yang
y equal » _ equal
yan y » yang y
cong » congo, long, hong

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan yan y equal credit ((training risk) or (training cost)) cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan y equal credit ((training risk) OR (training cost)) cong shu ;.
• Adding a wildcard symbol may retrieve word variants: wan yan y equal credit ((training risk) or (training cost)) cong shu ;*.