Perhaps you should try some spelling variations:
"its cooperation studies" » "its cooperation series", "its cooperation sources", "its cooperation implies", "city cooperation studies", "et cooperation studies", "its corporation studies"
"re dollarization notes" » "re dollarization its", "re dollarization causes", "re dollarization ratios", "de dollarization notes", "_ dollarization notes", "2 dollarization notes"
"mars colonization failed" » "mars colonization still", "mars organizations failed", "mrsa colonization failed", "its colonization failed", "jews colonization failed"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("its cooperation studies") or ("re dollarization notes"))) or ("mars colonization failed"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("its cooperation studies") OR ("re dollarization notes"))) OR ("mars colonization failed")).
• Removing quotes may allow a broader search: (((( its cooperation studies ) or ( re dollarization notes ))) or ( mars colonization failed )).
• Adding a wildcard symbol may retrieve word variants: (((("its cooperation studies") or ("re dollarization notes"))) or ("mars colonization failed"))*.