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"
"re colonization's mark" » "re colonization work", "decolonization _ mark", "_ colonization mark", "pro colonization mark"
"_ decolonization case" » "_ decolonization across", "_ decolonization notes", "_ decolonization _", "decolonization _ case"

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