Perhaps you should try some spelling variations:
training visit » training crisis, training asia, training vet
trading risk » trading case, trading room, funding risk
dual credit » rural credit, deals credit, equal credit
hua credit » a credit, du credit, ida credit
dong » doing, long, done
sin » sign, sind, skin

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

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