Perhaps you should try some spelling variations:
rural credits » rural credit, total credits
training risk » trading risk, training visit, training work
training cost » training costs, training course, trading costs
dual credit » rural credit, equal credit, total credit
yang dang » yang yang, yang dean, wang yang
hong ghi » hong g, hong hai
dang y » dang ly, yang y

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) or (rural credits)) ((training risk) or (training cost)) hong ghi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yang dang y ((dual credit) OR (rural credits)) ((training risk) OR (training cost)) hong ghi ;*.