Perhaps you should try some spelling variations:
"re decolonization africa" » "re democratization africa", "box decolonization africa", "war decolonization africa", "_ decolonisation africa"
"re colonization history" » "re communication history", "re organization history", "re cooperation history", "pro colonization history", "_ colonization history", "jews colonization history"
"_ decolonization from" » "_ decolonisation from", "_ decolonization across", "_ decolonization islam", "decolonization _ from"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("re decolonization africa") or ("_ decolonization from"))) or ("re colonization history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("re decolonization africa") OR ("_ decolonization from"))) OR ("re colonization history"))*.
• Removing quotes may allow a broader search: (((( re decolonization africa ) or ( _ decolonization from ))) or ( re colonization history ))*.