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"
"c's communication iran" » "c's communication iraq", "c's communication ireland", "c's communication brands", "lea's communication iran", "class communication iran", "mass 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("its community issues") OR ("c's communication iran"))) OR ("et cooperation history"))~.
• Removing quotes may allow a broader search: (((( its community issues ) or ( c's communication iran ))) or ( et cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("its community issues") or ("c's communication iran"))) or ("et cooperation history"))*.