Perhaps you should try some spelling variations:
"_ decolonisation from" » "_ decolonization from", "_ decolonisation _", "_ decolonisation 1"
"et cooperation history" » "et corporation history", "et federation history", "et cooperations history", "eu cooperation history", "2 cooperation history"
"mars colonization still" » "mars colonization failed", "mars colonization israel", "mars colonization songs", "mrsa colonization still", "its colonization still", "jews colonization still"

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 colonization still"))) OR ("et cooperation history"))~.
• Removing quotes may allow a broader search: (((( _ decolonisation from ) or ( mars colonization still ))) or ( et cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ decolonisation from") or ("mars colonization still"))) or ("et cooperation history"))*.