Perhaps you should try some spelling variations:
"its decolonization africa" » "its democratization africa", "its colonization africa", "box decolonization africa", "war decolonization africa"
"_ decolonization notes" » "_ decolonization models", "_ decolonization case", "_ decolonization indonesia", "decolonization _ notes"
"et cooperation history" » "et corporation history", "et federation history", "et cooperations history", "eu cooperation history", "2 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: (((("its decolonization africa") OR ("_ decolonization notes"))) OR ("et cooperation history"))~.
• Removing quotes may allow a broader search: (((( its decolonization africa ) or ( _ decolonization notes ))) or ( et cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("its decolonization africa") or ("_ decolonization notes"))) or ("et cooperation history"))*.