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 songs" » "mars colonization work", "mars decolonization notes", "mrsa colonization songs", "its colonization songs", "jews colonization songs"
"re colonization still" » "re colonization failed", "re colonization israel", "re cooperation still", "pro colonization still", "_ colonization still", "jews colonization still"

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