Perhaps you should try some spelling variations:
formal credit » rural credit
training risk » trading risk, training crisis, defining risk
training cost » training costs, training course, training courses
lang yan » wang yan, wang yang, zhang yan
y formal » _ formal, a formal, 3 formal
long du » long d, long do, long run
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 formal credit ((training risk) or (training cost)) long du ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang yan y formal credit ((training risk) OR (training cost)) long du ;.
• Adding a wildcard symbol may retrieve word variants: lang yan y formal credit ((training risk) or (training cost)) long du ;*.