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"
"_ colonization failed" » "_ colonization still", "_ organizations failed", "_ decolonization failed", "decolonization _ failed"
"pro colonization songs" » "pro colonization still", "pro colonization work", "pro decolonization notes", "bio colonization songs", "re colonization songs", "mars colonization songs"

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 ("pro colonization songs"))) or ("_ colonization failed"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("its cooperation studies") OR ("pro colonization songs"))) OR ("_ colonization failed"))*.
• Removing quotes may allow a broader search: (((( its cooperation studies ) or ( pro colonization songs ))) or ( _ colonization failed ))*.