Perhaps you should try some spelling variations:
"pro decolonization case" » "pro decolonization across", "pro decolonization notes", "pro decolonization _", "pro colonization case", "_ decolonization case", "box decolonization case"
"_ colonization failed" » "_ colonization still", "_ organizations failed", "_ decolonization failed", "decolonization _ failed"
"its cooperation still" » "its cooperation scale", "its cooperation state", "its cooperation studies", "city cooperation still", "et cooperation still", "its corporation still"

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