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