Perhaps you should try some spelling variations:
"re decolonization africa" » "re democratization africa", "_ decolonization africa", "re colonization africa", "box decolonization africa"
"_ colonization's mark" » "_ colonization work", "_ colonisation mark", "_ canonizations mark", "colonization _ mark"
"re cooperation history" » "re corporation history", "re federation history", "de cooperation history", "area cooperation history", "rate cooperation history"

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 ("_ colonization's mark"))) or ("re cooperation history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("re decolonization africa") OR ("_ colonization's mark"))) OR ("re cooperation history"))*.
• Removing quotes may allow a broader search: (((( re decolonization africa ) or ( _ colonization's mark ))) or ( re cooperation history ))*.