Perhaps you should try some spelling variations:
"eu cooperation studies" » "eu cooperation series", "eu cooperation sources", "eu cooperation implies", "et cooperation studies", "2 cooperation studies", "la cooperation studies"
"its colonization songs" » "its colonization still", "its colonization work", "its decolonization notes", "anti colonization songs", "jews colonization songs", "mars colonization songs"
"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: (("eu cooperation studies") or ((("re colonization _") or ("its colonization songs"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("eu cooperation studies") OR ((("re colonization _") OR ("its colonization songs")))).
• Removing quotes may allow a broader search: (( eu cooperation studies ) or ((( re colonization _ ) or ( its colonization songs )))).
• Adding a wildcard symbol may retrieve word variants: (("eu cooperation studies") or ((("re colonization _") or ("its colonization songs"))))*.