Perhaps you should try some spelling variations:
"et cooperations history" » "et cooperation history", "et corporations history", "et operaciones history", "et cooperatives history", "eu cooperation history"
"c's communication israel" » "c's communication issues", "c's communication iran", "c's communication iraq", "lea's communication israel", "class communication israel", "mass communication israel"
"nets community issues" » "needs community issues", "tents community issues", "arts community issues"

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

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