Perhaps you should try some spelling variations:
"_ colonization failed" » "_ colonization still", "_ organizations failed", "_ decolonization failed", "decolonization _ failed"
"pro cooperation still" » "pro cooperation scale", "pro cooperation state", "pro cooperation studies", "group cooperation still", "area cooperation still", "arab cooperation still"
"early generation state" » "energy generation state", "early detection state", "early education state", "early generation rate", "early generation system", "early operation state"

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: (("pro cooperation still") OR ((("early generation state") OR ("_ colonization failed"))))~.
• Removing quotes may allow a broader search: (( pro cooperation still ) or ((( early generation state ) or ( _ colonization failed ))))~.
• Adding a wildcard symbol may retrieve word variants: (("pro cooperation still") or ((("early generation state") or ("_ colonization failed"))))*.