Perhaps you should try some spelling variations:
"box decolonization africa" » "box democratization africa", "war decolonization africa", "1945 decolonization africa", "_ decolonisation africa"
"_ decolonization islam" » "_ decolonization from", "_ decolonization _", "_ colonization israel", "decolonization _ islam"
"re colonization history" » "re communication history", "re organization history", "re cooperation history", "pro colonization history", "_ colonization history", "jews colonization history"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"box decolonization africa\") OR (\"_ decolonization islam\"))) OR (\"re colonization history\"))~".
• Removing quotes may allow a broader search: (((( box decolonization africa ) OR ( _ decolonization islam ))) OR ( re colonization history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("box decolonization africa") OR ("_ decolonization islam"))) OR ("re colonization history"))*.