Perhaps you should try some spelling variations:
"its communication issues" » "its communication india", "its communication united", "its communication italy", "nets communication issues", "c's communication issues", "mass communication issues"
"et cooperation history" » "et corporation history", "et federation history", "et cooperations history", "eu cooperation history", "2 cooperation history"
"nets community issues" » "needs community issues", "tents community issues", "arts community issues"

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