Perhaps you should try some spelling variations:
"city cooperation history" » "city corporation history", "city federation history", "china cooperation history", "city corporations history"
"its colonization failed" » "its colonization still", "its organizations failed", "anti colonization failed", "jews colonization failed", "mars colonization failed"
"its cooperation series" » "its cooperation theories", "its cooperation sources", "its cooperation studies", "et cooperation series", "its corporation series", "its operation series"

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

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