Perhaps you should try some spelling variations:
training costss » training cost, training courses, training course
training costs » trading costs, training courses, training course
dual credit » rural credit, deals credit, equal credit
coping shu » cong shu
wang yang » wang yan, wang liang, wang yanling
yang yala » yang yang, yang yao, yang all

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang yala dual credit ((training costs) or (training costss)) coping shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang yala dual credit ((training costs) OR (training costss)) coping shu ;*.