Perhaps you should try some spelling variations:
training visit » training crisis, training asia, training vet
equals credit » equal credit, deals credit, dual credit
training cost » training costs, training course, training courses
e equals » _ equals
yan e » yan _, can e, dan e
wang » 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 or wing) yan e equals credit ((training visit) or (training cost)) cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wang OR wing) yan e equals credit ((training visit) OR (training cost)) cong shu ;.
• Adding a wildcard symbol may retrieve word variants: (wang or wing) yan e equals credit ((training visit) or (training cost)) cong shu ;*.