Perhaps you should try some spelling variations:
credit rationing » credit rating, credit ratings
rationing case » rationing car, rationing cross, rating case
wang liang » wang yang
yang yang » wang yang, wang yan
case cong » case cost
a credit » bad credit
ya a » a a, y a, ye a

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang liang) or (yang yang)) ya a credit rationing case cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang liang) OR (yang yang)) ya a credit rationing case cong shu ;*.