Perhaps you should try some spelling variations:
training course » training courses
training risk » trading risk, training visit, training cost
dual credit » rural credit, equal credit, rural credits
yang dang » yang yang, yang dean, wang yang
hong shu » hong seo, hong yu, hong ghi
dang y » dang ly, yang y
y dual » _ dual, a dual

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

• Performing a fuzzy search may retrieve terms with similar spellings: yang dang y dual credit ((training risk) or (training course)) hong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yang dang y dual credit ((training risk) OR (training course)) hong shu ;*.