Perhaps you should try some spelling variations:
"_ decolonisation from" » "_ decolonization from", "_ decolonisation _", "_ decolonisation 1"
"eu cooperation history" » "eu corporation history", "eu federation history", "et cooperation history", "2 cooperation history", "la cooperation history"
"its colonization songs" » "its colonization still", "its colonization work", "its decolonization notes", "anti colonization songs", "jews colonization songs", "mars colonization songs"

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