Perhaps you should try some spelling variations:
training course » training courses
credit training » credit trading, credit rationing, credit rating
course cong » course can, course could, course cross
hua credit » dual credit, a credit, du 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 training course cong shu ;~.
• Adding a wildcard symbol may retrieve word variants: dong sin ya hua credit training course cong shu ;*.