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"
"war decolonization case" » "war decolonization across", "war decolonization notes", "war decolonization _", "_ decolonization case", "box decolonization case", "1945 decolonization case"
"its cooperation history" » "its corporation history", "its federation history", "city cooperation history", "et 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: (((("its colonization history") OR ("war decolonization case"))) OR ("its cooperation history"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"its colonization history\") OR (\"war decolonization case\"))) OR (\"its cooperation history\"))".
• Removing quotes may allow a broader search: (((( its colonization history ) OR ( war decolonization case ))) OR ( its cooperation history )).
• Adding a wildcard symbol may retrieve word variants: (((("its colonization history") OR ("war decolonization case"))) OR ("its cooperation history"))*.