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 still" » "_ colonization failed", "_ colonization israel", "_ colonization songs", "_ decolonization still", "decolonization _ still"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"its decolonization africa\") OR (\"_ colonization still\"))) OR (\"et cooperation history\"))~".
• Removing quotes may allow a broader search: (((( its decolonization africa ) OR ( _ colonization still ))) OR ( et cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("its decolonization africa") OR ("_ colonization still"))) OR ("et cooperation history"))*.