Perhaps you should try some spelling variations:
"_ colonization history" » "_ communication history", "_ organization history", "_ civilization history", "_ decolonization history", "decolonization _ history"
"re colonization africa" » "re decolonization africa", "re cooperation africa", "re urbanization africa", "pro colonization africa", "jews colonization africa", "mars colonization africa"
"city cooperation history" » "city corporation history", "city federation history", "china cooperation history", "city corporations 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 colonization africa") OR ("_ colonization history"))) OR ("city cooperation history"))~.
• Removing quotes may allow a broader search: (((( re colonization africa ) or ( _ colonization history ))) or ( city cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("re colonization africa") or ("_ colonization history"))) or ("city cooperation history"))*.