Perhaps you should try some spelling variations:
rating case » trading case, rating scale, heating case
case coping » career coping, change coping, case company
hua credit » dual credit, a credit, ida credit
coping shu » cong shu
dong qian » gong qiang, ong kian, dong sin
du credit » de credit, 2 credit
qian yan » qian jun, qian yi

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

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