Perhaps you should try some spelling variations:
"box decolonization africa" » "box democratization africa", "_ decolonization africa", "war decolonization africa", "1945 decolonization africa"
"_ colonization failed" » "_ colonization still", "_ organizations failed", "_ decolonization failed", "decolonization _ failed"
"its cooperation history" » "its corporation history", "its federation history", "city cooperation history", "et cooperation history"

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

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