Perhaps you should try some spelling variations:
"u.s communications visual" » "u.s communications leisure", "u.s communication via", "u.s communications ensure", "3.1 communications visual", "les communications visual", "nps communications visual"
"nets communication israel" » "nets communication issues", "nets communication iran", "nets communication iraq", "lea's communication israel", "mass communication israel", "c's communication israel"
"et cooperation history" » "et corporation history", "et federation history", "et cooperations history", "eu cooperation history", "2 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 visual") OR ("nets communication israel"))) OR ("et cooperation history"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"u.s communications visual\") OR (\"nets communication israel\"))) OR (\"et cooperation history\"))".
• Removing quotes may allow a broader search: (((( u.s communications visual ) OR ( nets communication israel ))) OR ( et cooperation history )).
• Adding a wildcard symbol may retrieve word variants: (((("u.s communications visual") OR ("nets communication israel"))) OR ("et cooperation history"))*.