Perhaps you should try some spelling variations:
credit creating » credits creating, credit rating, credit ratings
change coping » change scoping, change mowing, change comparing
change cong » change long, change hong, change among
hua credit » dual credit, a credit, du credit
nan yan » wang yan, qian yan, dan yang
nan ya » nana yaa

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 yan) OR (nan ya)) hua credit creating ((change cong) or (change coping)) shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong ((nan yan) OR (nan ya)) hua credit creating ((change cong) OR (change coping)) shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong ((nan yan) OR (nan ya)) hua credit creating ((change cong) or (change coping)) shu ;*".