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"
"lea's communication iraq" » "mass communication iraq", "crisis communication iraq", "leadership communication iraq", "lea's communication iran", "lea's communication israel", "lea's communication italy"
"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 ("lea's communication iraq"))) or ("et cooperation history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("its community issues") OR ("lea's communication iraq"))) OR ("et cooperation history")).
• Removing quotes may allow a broader search: (((( its community issues ) or ( lea's communication iraq ))) or ( et cooperation history )).
• Adding a wildcard symbol may retrieve word variants: (((("its community issues") or ("lea's communication iraq"))) or ("et cooperation history"))*.