Perhaps you should try some spelling variations:
"et cooperation history" » "et corporation history", "et federation history", "et cooperations history", "eu cooperation history", "2 cooperation history"
"nets communication iran" » "lea's communication iran", "mass communication iran", "c's communication iran", "nets communication iraq", "nets communication ireland", "nets communication brands"
"its community issues" » "icts community issues", "city 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: (((("its community issues") OR ("nets communication iran"))) OR ("et cooperation history"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"its community issues\") OR (\"nets communication iran\"))) OR (\"et cooperation history\"))".
• Removing quotes may allow a broader search: (((( its community issues ) OR ( nets communication iran ))) OR ( et cooperation history )).
• Adding a wildcard symbol may retrieve word variants: (((("its community issues") OR ("nets communication iran"))) OR ("et cooperation history"))*.