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"
"mars colonization failed" » "mars colonization still", "mars organizations failed", "its colonization failed", "jews colonization failed", "pro colonization failed"
"mrsa colonization notes" » "mrsa decolonization notes", "mrsa colonization songs", "mrsa dollarization notes", "coca colonization notes", "its colonization notes", "pro colonization notes"

Try widening your search to All Fields.

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