Perhaps you should try some spelling variations:
"its decolonization from" » "its decolonisation from", "its decolonization africa", "its decolonization across", "_ decolonization from", "box decolonization from", "war decolonization from"
"city cooperation history" » "city corporation history", "city federation history", "china cooperation history", "city corporations history"
"its colonization notes" » "its decolonization notes", "its colonization songs", "its dollarization notes", "anti colonization notes", "jews colonization notes", "mars colonization notes"

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: (((("its decolonization from") OR ("its colonization notes"))) OR ("city cooperation history"))~.
• Removing quotes may allow a broader search: (((( its decolonization from ) or ( its colonization notes ))) or ( city cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("its decolonization from") or ("its colonization notes"))) or ("city cooperation history"))*.