Perhaps you should try some spelling variations:
"class communication israel" » "class communication iran", "class communication iraq", "class telecommunication israel", "mass communication israel", "plans communication israel", "crisis communication israel"
"nets communication issues" » "nets community issues", "nets communication india", "nets communication united", "lea's communication issues", "mass communication issues", "c's communication issues"
"et cooperation history" » "et corporation history", "et federation history", "et cooperations history", "eu cooperation history", "2 cooperation history"

Try widening your search to All Fields.

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

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