Perhaps you should try some spelling variations:
"its decolonization africa" » "its democratization africa", "its colonization africa", "_ decolonization africa", "box decolonization africa"
"_ colonization still" » "_ colonization failed", "_ colonization israel", "_ colonization songs", "_ decolonization still", "decolonization _ still"
"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: (((("its decolonization africa") OR ("_ colonization still"))) OR ("its federation history"))~.
• Removing quotes may allow a broader search: (((( its decolonization africa ) or ( _ colonization still ))) or ( its federation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("its decolonization africa") or ("_ colonization still"))) or ("its federation history"))*.