Perhaps you should try some spelling variations:
"mass media -- political aspect -- united states" » "mass media -- political aspects -- united states"
"maps media -- political aspect -- united states" » "maps media -- political aspects -- united states"
"maps medan -- political aspect -- united states" » "maps medan -- political aspects -- united states"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("mass media -- political aspect -- united states") or ((("maps media -- political aspect -- united states") OR ("maps medan -- political aspect -- united states"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("mass media -- political aspect -- united states") OR ((("maps media -- political aspect -- united states") OR ("maps medan -- political aspect -- united states")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"mass media -- political aspect -- united states\") or (((\"maps media -- political aspect -- united states\") OR (\"maps medan -- political aspect -- united states\"))))".
• Removing quotes may allow a broader search: (( mass media -- political aspect -- united states ) or ((( maps media -- political aspect -- united states ) OR ( maps medan -- political aspect -- united states )))).
• Adding a wildcard symbol may retrieve word variants: (("mass media -- political aspect -- united states") or ((("maps media -- political aspect -- united states") OR ("maps medan -- political aspect -- united states"))))*.

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