Perhaps you should try some spelling variations:
credit training » credit trading, credit rationing, credit rating
course cross » discourse cross, course group
course cong » course can, course could
hua credit » dual credit, a credit, du credit
nana yaa » nan ya, nanay a
nan yan » nan ya, wang yan, qian yan

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

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