Perhaps you should try some spelling variations:
"its decolonization africa" » "its democratization africa", "its colonization africa", "_ decolonization africa", "box decolonization africa"
"et cooperation history" » "et corporation history", "et federation history", "et cooperations history", "eu cooperation history", "2 cooperation history"
"_ colonization work" » "_ colonization's mark", "_ colonization songs", "_ colonization _", "_ decolonization work", "decolonization _ work"

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 work"))) OR ("et cooperation history"))~.
• Removing quotes may allow a broader search: (((( its decolonization africa ) or ( _ colonization work ))) or ( et cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("its decolonization africa") or ("_ colonization work"))) or ("et cooperation history"))*.