Perhaps you should try some spelling variations:
"1945 decolonization africa" » "1945 democratization africa", "_ decolonization africa", "4.4 decolonisation africa", "box decolonization africa"
"_ communication italy" » "_ communication india", "_ communication united"
"de cooperation history" » "de corporation history", "de federation history", "2 cooperation history", "trade cooperation history", "area 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: (((("1945 decolonization africa") OR ("_ communication italy"))) OR ("de cooperation history"))~.
• Removing quotes may allow a broader search: (((( 1945 decolonization africa ) or ( _ communication italy ))) or ( de cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("1945 decolonization africa") or ("_ communication italy"))) or ("de cooperation history"))*.