Perhaps you should try some spelling variations:
course group » house group, course cross, course four
course cong » course can, course could, course cross
hua credit » dual credit, a credit, du credit
dong yang » dong hoang, wang yang, yang yang
de credit » du credit, 2 credit, trade credit
yang ya » yang yao, yang yi, yang ka

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong yang ya ((hua credit) or (de credit)) rating ((course cong) or (course group)) shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yang ya ((hua credit) OR (de credit)) rating ((course cong) OR (course group)) shu ;.
• Adding a wildcard symbol may retrieve word variants: dong yang ya ((hua credit) or (de credit)) rating ((course cong) or (course group)) shu ;*.