Perhaps you should try some spelling variations:
"class communication israel" » "class communication issues", "class communication iran", "class telecommunication israel", "plans communication israel", "crisis communication israel", "causes communication israel"
"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 italy", "mass communication ideas", "maps communication iraq"

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: (((("class communication israel") OR ("mass communication iraq"))) OR ("et cooperation history"))~.
• Removing quotes may allow a broader search: (((( class communication israel ) or ( mass communication iraq ))) or ( et cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("class communication israel") or ("mass communication iraq"))) or ("et cooperation history"))*.