Perhaps you should try some spelling variations:
training course » training courses
training risk » trading risk, training crisis, defining risk
total credit » formal credit, rural credit
lang yan » wang yan, wang yang, zhang yan
y total » _ total, a total, 2 total
yan y » yang y, yan _, yan 4

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

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