Perhaps you should try some spelling variations:
"u.s communication services" » "u.s telecommunications services", "u.s communications services", "2.3 communication services", "3.2 communication services"
"its cooperation history" » "its corporation history", "its federation history", "city cooperation history", "et cooperation history"
"nets communication iraq" » "lea's communication iraq", "mass communication iraq", "c's communication iraq", "nets communication iran", "nets communication israel", "nets communication italy"

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