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