Perhaps you should try some spelling variations:
"mars decolonization notes" » "mars decolonization models", "mars decolonization case", "mars decolonization indonesia", "mars colonization notes", "war decolonization notes", "empire decolonization notes"
"city cooperation history" » "city corporation history", "city federation history", "china cooperation history", "city corporations history"
"its colonization from" » "its decolonization from", "its decolonisation from", "its colonization french", "anti colonization from", "jews colonization from", "mars colonization from"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"its colonization from\") OR (\"mars decolonization notes\"))) OR (\"city cooperation history\"))~".
• Removing quotes may allow a broader search: (((( its colonization from ) OR ( mars decolonization notes ))) OR ( city cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("its colonization from") OR ("mars decolonization notes"))) OR ("city cooperation history"))*.