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"
"c's communication issues" » "c's communication india", "c's communication united", "c's communication italy", "lea's communication issues", "class communication issues", "mass communication issues"
"c's community issues" » "ccs community issues", "cost community issues", "icts community issues"

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 ((("c's communication issues") OR ("c's community issues"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("mars communication history") OR ((("c's communication issues") OR ("c's community issues"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"mars communication history\") or (((\"c's communication issues\") OR (\"c's community issues\"))))*".
• Removing quotes may allow a broader search: (( mars communication history ) or ((( c's communication issues ) OR ( c's community issues ))))*.