Perhaps you should try some spelling variations:
"_ decolonization failed" » "_ colonization failed", "_ decolonization case", "_ decolonization africa", "decolonization _ failed"
"de communication sector" » "de telecommunication sector", "de telecommunications sector", "de communication series", "mobile communication sector", "online communication sector"
"war decolonization from" » "war decolonisation from", "war decolonization africa", "war decolonization across", "box decolonization from", "1945 decolonization from", "_ decolonisation from"

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: (((("war decolonization from") OR ("_ decolonization failed"))) OR ("de communication sector"))~.
• Removing quotes may allow a broader search: (((( war decolonization from ) or ( _ decolonization failed ))) or ( de communication sector ))~.
• Adding a wildcard symbol may retrieve word variants: (((("war decolonization from") or ("_ decolonization failed"))) or ("de communication sector"))*.