Perhaps you should try some spelling variations:
"mars communication history" » "mars telecommunication history", "mars communication sector", "mars communication theory", "mass communication history", "mass communications history", "markets communication history"
"its colonization history" » "its organization history", "its cooperation history", "its civilization history", "anti colonization history", "jews colonization history", "mars colonization history"
"mars cooperation scale" » "mars cooperation case", "mars cooperation state", "mars cooperation sara", "early cooperation scale", "area cooperation scale", "arab cooperation scale"

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