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"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"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 ))*.