Perhaps you should try some spelling variations:
"_ cooperation studies" » "_ cooperation series", "_ cooperation sources", "_ cooperation implies"
"its cooperation history" » "its corporation history", "its federation history", "city cooperation history", "et cooperation history"
"its colonization still" » "its colonization failed", "its colonization israel", "its colonization songs", "anti colonization still", "jews colonization still", "mars colonization still"

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: (((("its colonization still") OR ("_ cooperation studies"))) OR ("its cooperation history"))~.
• Removing quotes may allow a broader search: (((( its colonization still ) or ( _ cooperation studies ))) or ( its cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("its colonization still") or ("_ cooperation studies"))) or ("its cooperation history"))*.