Perhaps you should try some spelling variations:
credit creating » credits creating, credit rating, credit ratings
credit heating » credit rating, credits creating, credit granting
case coping » career coping, change coping, case company
coping shu » cong shu
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 ya) or (nan yan)) dual ((credit heating) OR (credit creating)) case coping shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong ((nan ya) OR (nan yan)) dual ((credit heating) OR (credit creating)) case coping shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong ((nan ya) or (nan yan)) dual ((credit heating) OR (credit creating)) case coping shu ;*".