Perhaps you should try some spelling variations:
"pro colonization failed" » "pro colonization still", "pro organizations failed", "bio colonization failed", "re colonization failed", "mars colonization failed"
"pro decolonization case" » "pro decolonization across", "pro decolonization notes", "pro decolonization _", "_ decolonization case", "box decolonization case", "war decolonization case"
"its cooperation scale" » "its cooperation case", "its cooperation state", "its cooperation sara", "city cooperation scale", "et cooperation scale", "its corporation scale"

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

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