Perhaps you should try some spelling variations:
"les communication system" » "les communication systems", "les telecommunication system", "les communication series", "les communications system", "lea's communication system", "c's communication system"
"nets communication israel" » "nets communication issues", "nets communication iran", "nets communication iraq", "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"

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