Perhaps you should try some spelling variations:
training risk » trading risk, training visit, training work
training cost » training costs, training course, trading costs
trading cost » trading costs, trading case, training costs
dual credit » rural credit, equal credit, rural credits
dong yang » dong hoang, wang yang, yang yang
yang y » yang yi, yang d, yang y.c
y dual » _ dual, a dual
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: dong yang y dual credit ((((training risk) or (trading cost))) or (training cost)) cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yang y dual credit ((((training risk) OR (trading cost))) OR (training cost)) cong shu ;.
• Adding a wildcard symbol may retrieve word variants: dong yang y dual credit ((((training risk) or (trading cost))) or (training cost)) cong shu ;*.