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
dong nana » dong nan, dong yang
nana yaa » nan ya, nan yan, nanay a
yaa hua » ya hua

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 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 hua credit training ((course cong) OR (course cross)) shu ;.
• Adding a wildcard symbol may retrieve word variants: dong nana yaa hua credit training ((course cong) or (course cross)) shu ;*.