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 scale" » "mars cooperation case", "mars cooperation state", "mars cooperation sara", "early cooperation scale", "area cooperation scale", "arab cooperation scale"

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