Perhaps you should try some spelling variations:
"_ colonization failed" » "_ colonization still", "_ organizations failed", "_ decolonization failed", "decolonization _ failed"
"group cooperation still" » "group operations still", "global cooperation still", "gulf cooperation still", "group cooperation scale", "group cooperation state", "group cooperation studies"
"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: (("group cooperation still") OR ((("early operation state") OR ("_ colonization failed"))))~.
• Removing quotes may allow a broader search: (( group cooperation still ) or ((( early operation state ) or ( _ colonization failed ))))~.
• Adding a wildcard symbol may retrieve word variants: (("group cooperation still") or ((("early operation state") or ("_ colonization failed"))))*.