Perhaps you should try some spelling variations:
training course » training courses
training risk » trading risk, training visit, training cost
equal credit » rural credit, total credit, local credit
dual credit » rural credit, rural credits, total credit
dong yang » dong hoang, wang yang, yang yang
long shu » wong sau
yang y » yang yi, yang d, yang y.c

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

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