Perhaps you should try some spelling variations:
training visit » training crisis, training asia, training vet
rural credits » rural credit, total credits
training cost » training costs, training course, training courses
dong skin » dong sin, dong bin, dof skin
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 visit) OR (training cost)) cong shu ;~.
• Adding a wildcard symbol may retrieve word variants: dong skin ya rural credits ((training visit) or (training cost)) cong shu ;*.