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