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"
"_ decolonisation from" » "_ decolonization from", "_ decolonisation _", "_ decolonisation 1"
"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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("_ decolonisation from") OR ("mars decolonization notes"))) OR ("city cooperation history"))~.
• Removing quotes may allow a broader search: (((( _ decolonisation from ) or ( mars decolonization notes ))) or ( city cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ decolonisation from") or ("mars decolonization notes"))) or ("city cooperation history"))*.