Perhaps you should try some spelling variations:
"_ decolonization failed" » "_ colonization failed", "_ decolonization case", "_ decolonization africa", "decolonization _ failed"
"city cooperation studies" » "city cooperation series", "city cooperation sources", "city cooperation implies", "city corporation studies", "china cooperation studies", "city corporations studies"
"re colonization work" » "re colonization's mark", "re colonization songs", "re colonization _", "pro colonization work", "_ colonization work", "jews colonization work"

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: (((("city cooperation studies") OR ("re colonization work"))) OR ("_ decolonization failed"))~.
• Removing quotes may allow a broader search: (((( city cooperation studies ) or ( re colonization work ))) or ( _ decolonization failed ))~.
• Adding a wildcard symbol may retrieve word variants: (((("city cooperation studies") or ("re colonization work"))) or ("_ decolonization failed"))*.