Perhaps you should try some spelling variations:
based perspectives » based perspective, et perspectives
perspectives cross » perspectives across, perspectives book
commercial credit » commercial code
cross studies » across studies, css studies, cass studies
credit costs » credit crisis, credit cards, credit booms
costs based » cost based, costs case, hots based

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

• Performing a fuzzy search may retrieve terms with similar spellings: commercial credit costs based perspectives cross studies.~.
• Adding a wildcard symbol may retrieve word variants: commercial credit costs based perspectives cross studies.*.