Perhaps you should try some spelling variations:
"_ decolonization from" » "_ decolonisation from", "_ decolonization africa", "_ decolonization across"
"its cooperation history" » "its corporation history", "its federation history", "city cooperation history", "et cooperation history"
"its colonization still" » "its colonization failed", "its colonization israel", "its colonization songs", "anti colonization still", "jews colonization still", "mars colonization still"

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

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