Perhaps you should try some spelling variations:
"_ communication history" » "_ telecommunication history", "_ communication sector", "_ communication theory"
"re decolonization africa" » "re democratization africa", "_ decolonization africa", "re colonization africa", "box decolonization africa"
"area cooperation history" » "area corporation history", "area federation history", "asian cooperation history", "border cooperation history", "china 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: (((("re decolonization africa") OR ("_ communication history"))) OR ("area cooperation history"))~.
• Removing quotes may allow a broader search: (((( re decolonization africa ) or ( _ communication history ))) or ( area cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("re decolonization africa") or ("_ communication history"))) or ("area cooperation history"))*.