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

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 1") OR ("its colonization songs"))) OR ("its cooperation history"))~.
• Removing quotes may allow a broader search: (((( _ decolonisation 1 ) or ( its colonization songs ))) or ( its cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ decolonisation 1") or ("its colonization songs"))) or ("its cooperation history"))*.