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 iran" » "mass communication iraq", "mass communication ireland", "mass communication brands", "maps communication iran"
"its community issues" » "icts community issues", "city community issues", "arts 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: (((("its community issues") or ("mass communication iran"))) or ("et cooperation history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("its community issues") OR ("mass communication iran"))) OR ("et cooperation history")).
• Removing quotes may allow a broader search: (((( its community issues ) or ( mass communication iran ))) or ( et cooperation history )).
• Adding a wildcard symbol may retrieve word variants: (((("its community issues") or ("mass communication iran"))) or ("et cooperation history"))*.