Perhaps you should try some spelling variations:
training visit » training test
training cost » training costs, training course, trading costs
equal credit » dual credit, rural credit, total credit
y equal » _ equal
yan y » yang y
wang » wing, wan, lang
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: wang yan y equal credit ((training visit) or (training cost)) cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan y equal credit ((training visit) OR (training cost)) cong shu ;.
• Adding a wildcard symbol may retrieve word variants: wang yan y equal credit ((training visit) or (training cost)) cong shu ;*.