Perhaps you should try some spelling variations:
cooperation implies » cooperation series, cooperation studies, cooperation civility
colonization songs » colonization work, decolonization notes
colonization still » colonization failed, colonization israel, cooperation still
early cooperation » early operation, early cooperative, energy cooperation
mars colonization » mrsa colonization, its colonization, jews colonization
re colonization » pro colonization, _ colonization, jews colonization

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((( early cooperation implies ) or ( mars colonization songs ))) or ( re colonization still ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( early cooperation implies ) OR ( mars colonization songs ))) OR ( re colonization still )).
• Adding a wildcard symbol may retrieve word variants: (((( early cooperation implies ) or ( mars colonization songs ))) or ( re colonization still ))*.