Perhaps you should try some spelling variations:
"its colonization history" » "its communication history", "its organization history", "its civilization history", "anti colonization history", "jews colonization history", "mars colonization history"
"_ decolonization notes" » "_ decolonization models", "_ decolonization case", "_ decolonization indonesia", "decolonization _ notes"
"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.

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