Perhaps you should try some spelling variations:
"its cooperation history" » "its corporation history", "its federation history", "et cooperation history", "its operation history"
"city cooperation still" » "city cooperation scale", "city cooperation state", "city cooperation studies", "city corporation still", "china cooperation still", "city corporations still"
"its colonization work" » "its colonization's mark", "its colonization songs", "its colonization _", "anti colonization work", "jews colonization work", "mars 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 still") OR ("its colonization work"))) OR ("its cooperation history"))~.
• Removing quotes may allow a broader search: (((( city cooperation still ) or ( its colonization work ))) or ( its cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("city cooperation still") or ("its colonization work"))) or ("its cooperation history"))*.