Perhaps you should try some spelling variations:
"_ decolonization africa" » "_ democratization africa"
"eu cooperation history" » "eu corporation history", "eu federation history", "et cooperation history", "2 cooperation history", "la cooperation history"
"2 organizations fad" » "2 organizations a", "2 organizations can", "2 organizations d.d", "2 organization fad", "d organizations fad", "g organizations fad"

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 ("2 organizations fad"))) OR ("eu cooperation history"))~.
• Removing quotes may allow a broader search: (((( _ decolonization africa ) or ( 2 organizations fad ))) or ( eu cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ decolonization africa") or ("2 organizations fad"))) or ("eu cooperation history"))*.