Perhaps you should try some spelling variations:
"ngo communication issues" » "ngo community issues", "ngo communication india", "ngo communication united", "togo communications issues", "de communication issues", "3 communication issues"
"early cooperation studies" » "early cooperation series", "early cooperation sources", "early cooperation implies", "early operation studies", "early cooperative studies", "energy cooperation studies"
"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: (("ngo communication issues") OR ((("early cooperation studies") OR ("its colonization still"))))~.
• Removing quotes may allow a broader search: (( ngo communication issues ) or ((( early cooperation studies ) or ( its colonization still ))))~.
• Adding a wildcard symbol may retrieve word variants: (("ngo communication issues") or ((("early cooperation studies") or ("its colonization still"))))*.