Perhaps you should try some spelling variations:
"u.s communication issues" » "u.s community issues", "u.s communication india", "u.s communication united", "u.s communications issues", "2.3 communication issues", "3.2 communication issues"
"nets communication israel" » "nets communication iran", "nets communication iraq", "nets telecommunication israel", "lea's communication israel", "mass communication israel", "c's communication israel"
"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 communication issues") or ("nets communication israel"))) or ("its cooperation history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("u.s communication issues") OR ("nets communication israel"))) OR ("its cooperation history")).
• Removing quotes may allow a broader search: (((( u.s communication issues ) or ( nets communication israel ))) or ( its cooperation history )).
• Adding a wildcard symbol may retrieve word variants: (((("u.s communication issues") or ("nets communication israel"))) or ("its cooperation history"))*.