Perhaps you should try some spelling variations:
training course » training courses
rural credits » rural credit, total credits
training risk » trading risk, training visit, training work
training cost » training costs, trading costs, training courses
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.

• Performing a fuzzy search may retrieve terms with similar spellings: dong skin ya rural credits ((training risk) or (((training cost) OR (training course)))) cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong skin ya rural credits ((training risk) OR (((training cost) OR (training course)))) cong shu ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong skin ya rural credits ((training risk) or (((training cost) OR (training course)))) cong shu ;".
• Adding a wildcard symbol may retrieve word variants: dong skin ya rural credits ((training risk) or (((training cost) OR (training course)))) cong shu ;*.