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"
"et cooperation history" » "et corporation history", "et federation history", "et cooperations history", "eu cooperation history", "2 cooperation history"
"nets communication iraq" » "lea's communication iraq", "mass communication iraq", "c's communication iraq", "nets communication iran", "nets communication israel", "nets communication italy"

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