Perhaps you should try some spelling variations:
"_ decolonization failed" » "_ colonization failed", "_ decolonization case", "_ decolonization africa", "decolonization _ failed"
"re cooperation history" » "re corporation history", "re federation history", "de cooperation history", "area cooperation history", "rate cooperation history"
"early cooperation state" » "early operation state", "early cooperative state", "energy cooperation state", "early cooperation scale", "early cooperation strategy"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("re cooperation history") or ((("early cooperation state") or ("_ decolonization failed"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("re cooperation history") OR ((("early cooperation state") OR ("_ decolonization failed"))))*.
• Removing quotes may allow a broader search: (( re cooperation history ) or ((( early cooperation state ) or ( _ decolonization failed ))))*.