Perhaps you should try some spelling variations:
"_ decolonization africa" » "_ democratization africa", "decolonization _ africa"
"re colonization history" » "re communication history", "re organization history", "re cooperation history", "pro colonization history", "_ colonization history", "jews colonization history"
"re decolonisation from" » "re decolonization from", "re decolonisation _", "re decolonisation 1", "_ decolonisation from", "4.4 decolonisation from", "_ decolonisations 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: (((("re decolonisation from") OR ("_ decolonization africa"))) OR ("re colonization history"))~.
• Removing quotes may allow a broader search: (((( re decolonisation from ) or ( _ decolonization africa ))) or ( re colonization history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("re decolonisation from") or ("_ decolonization africa"))) or ("re colonization history"))*.