Perhaps you should try some spelling variations:
"nets communication issues" » "nets community issues", "nets communication india", "nets communication united", "lea's communication issues", "mass communication issues", "c's communication issues"
"u.s communications iran" » "u.s communication iran", "u.s communications brand", "u.s communication iraq", "3.1 communications iran", "les communications iran", "nps communications iran"
"its cooperation history" » "its corporation history", "its federation history", "city cooperation history", "et cooperation history"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("u.s communications iran") or ("nets communication issues"))) or ("its cooperation history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("u.s communications iran") OR ("nets communication issues"))) OR ("its cooperation history"))*.
• Removing quotes may allow a broader search: (((( u.s communications iran ) or ( nets communication issues ))) or ( its cooperation history ))*.