Perhaps you should try some spelling variations:
"nets communication history" » "nets telecommunication history", "nets communication sector", "nets communication theory", "lea's communication history", "mass communication history", "c's communication history"
"mars colonization israel" » "mars communication israel", "mars colonization still", "mars colonization history", "mrsa colonization israel", "its colonization israel", "jews colonization israel"
"mars cooperation state" » "mars cooperation scale", "mars operation state", "mars cooperation strategy", "early cooperation state", "area cooperation state", "arab cooperation state"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("mars colonization israel") or ((("mars cooperation state") or ("nets communication history"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("mars colonization israel") OR ((("mars cooperation state") OR ("nets communication history")))).
• Removing quotes may allow a broader search: (( mars colonization israel ) or ((( mars cooperation state ) or ( nets communication history )))).
• Adding a wildcard symbol may retrieve word variants: (("mars colonization israel") or ((("mars cooperation state") or ("nets communication history"))))*.