Perhaps you should try some spelling variations:
"_ decolonization africa" » "_ democratization africa"
"re organizations failed" » "re organizations based", "re organizations fad", "re organization failures", "care organizations failed", "era organizations failed", "2 organizations failed"
"its federation history" » "its migration history", "les federations history", "_ federation history", "3 federation 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: (((("_ decolonization africa") OR ("re organizations failed"))) OR ("its federation history"))~.
• Removing quotes may allow a broader search: (((( _ decolonization africa ) or ( re organizations failed ))) or ( its federation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ decolonization africa") or ("re organizations failed"))) or ("its federation history"))*.