Perhaps you should try some spelling variations:
credit training » credit trading, credit rationing, credit rating
training costs » trading costs, training courses, training course
costs congo » costs longer
hua credit » dual credit, a credit, du credit
yang yang » wang yang, wang yan
congo shu » cong shu
dong nan » dong yang, dong sin, dong bin

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) or (yang yang)) ya hua credit training costs congo shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong nan) OR (yang yang)) ya hua credit training costs congo shu ;*.