Perhaps you should try some spelling variations:
"et cooperation history" » "et corporation history", "et federation history", "et cooperations history", "eu cooperation history", "2 cooperation history"
"its decolonisation 1" » "_ decolonisation 1", "4.4 decolonisation 1", "its colonization 1", "its decolonisation _", "its decolonisations _", "its decolonization _"
"_ colonization still" » "_ colonization failed", "_ colonization israel", "_ colonization songs", "_ decolonization still", "decolonization _ still"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("its decolonisation 1") or ("_ colonization still"))) or ("et cooperation history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("its decolonisation 1") OR ("_ colonization still"))) OR ("et cooperation history"))*.
• Removing quotes may allow a broader search: (((( its decolonisation 1 ) or ( _ colonization still ))) or ( et cooperation history ))*.