Perhaps you should try some spelling variations:
rural credits » rural credit, total credits
training risk » trading risk, training visit, training work
training cost » training costs, training course, trading costs
dong skin » dong sin, dong bin
ya rural » a rural, has rural, pay rural
cong » congo, long, hong

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

• If you are trying to use Boolean operators, they must be ALL CAPS: dong skin ya rural credits ((training risk) OR (training cost)) cong shu ;~.
• Adding a wildcard symbol may retrieve word variants: dong skin ya rural credits ((training risk) or (training cost)) cong shu ;*.