Perhaps you should try some spelling variations:
"_ decolonization failed" » "_ colonization failed", "_ decolonization case", "_ decolonization africa", "decolonization _ failed"
"its cooperation history" » "its corporation history", "its federation history", "city cooperation history", "et cooperation history"
"its colonization work" » "its colonization's mark", "its colonization songs", "its colonization _", "anti colonization work", "jews colonization work", "mars colonization work"

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