Perhaps you should try some spelling variations:
credit training » credit trading, credit rationing, credit rating
training cost » training costs, training course, training courses
hua credit » dual credit, a credit, du credit
dong nan » dong yang, dong sin, dong bin
nan yan » nan ya, wang yan, qian yan
yan hua » tan hua, ya hua, wang 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 nan yan hua credit training cost (cong or long) shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong nan yan hua credit training cost (cong OR long) shu ;.
• Adding a wildcard symbol may retrieve word variants: dong nan yan hua credit training cost (cong or long) shu ;*.