Perhaps you should try some spelling variations:
sound credit » should credit, bond credit, fund credit
crises model » crises models, crisis model, crisis models
crisis were » crisis war, crisis wave, crisis before
crises were » crises korea, classes were
wang yang » wang yan, wang liang, wang yanling
yang ying » yang yang, yang jing, huang ying

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang ying sound credit rating ((crises model) or (((crisis were) OR (crises were)))) six ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang ying sound credit rating ((crises model) OR (((crisis were) OR (crises were)))) six ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang ying sound credit rating ((crises model) or (((crisis were) OR (crises were)))) six ;*".