Perhaps you should try some spelling variations:
"_ decolonization failed" » "_ colonization failed", "_ decolonization case", "_ decolonization africa", "decolonization _ failed"
"eu cooperation history" » "eu corporation history", "eu federation history", "et cooperation history", "2 cooperation history", "la cooperation history"
"its colonization still" » "its colonization failed", "its colonization israel", "its colonization songs", "anti colonization still", "jews colonization still", "mars colonization 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 colonization still") or ("_ decolonization failed"))) or ("eu cooperation history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("its colonization still") OR ("_ decolonization failed"))) OR ("eu cooperation history")).
• Removing quotes may allow a broader search: (((( its colonization still ) or ( _ decolonization failed ))) or ( eu cooperation history )).
• Adding a wildcard symbol may retrieve word variants: (((("its colonization still") or ("_ decolonization failed"))) or ("eu cooperation history"))*.