Perhaps you should try some spelling variations:
"et cooperation history" » "et corporation history", "et federation history", "et cooperations history", "eu cooperation history", "2 cooperation history"
"mass communication iraq" » "mass communication iran", "mass communication israel", "mass communication italy", "maps communication iraq"
"city community issues" » "society community issues", "cities community issues", "security community issues"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("city community issues") or ("mass communication iraq"))) or ("et cooperation history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("city community issues") OR ("mass communication iraq"))) OR ("et cooperation history")).
• Removing quotes may allow a broader search: (((( city community issues ) or ( mass communication iraq ))) or ( et cooperation history )).
• Adding a wildcard symbol may retrieve word variants: (((("city community issues") or ("mass communication iraq"))) or ("et cooperation history"))*.