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

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"pro cooperation still\") OR (((\"early generation rate\") OR (\"re colonization failed\"))))~".
• Removing quotes may allow a broader search: (( pro cooperation still ) OR ((( early generation rate ) OR ( re colonization failed ))))~.
• Adding a wildcard symbol may retrieve word variants: (("pro cooperation still") OR ((("early generation rate") OR ("re colonization failed"))))*.