Perhaps you should try some spelling variations:
"class communication issues" » "class community issues", "class communication india", "class communication united", "mass communication issues", "plans communication issues", "crisis communication issues"
"nets communication israel" » "nets communication iran", "nets communication iraq", "nets telecommunication israel", "lea's communication israel", "mass communication israel", "c's communication israel"
"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 issues") or ("nets communication israel"))) or ("et cooperation history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("class communication issues") OR ("nets communication israel"))) OR ("et cooperation history")).
• Removing quotes may allow a broader search: (((( class communication issues ) or ( nets communication israel ))) or ( et cooperation history )).
• Adding a wildcard symbol may retrieve word variants: (((("class communication issues") or ("nets communication israel"))) or ("et cooperation history"))*.