Perhaps you should try some spelling variations:
"mass communications issues" » "mass communication issues", "mass communications studies", "mass communications costs", "data communications issues", "crisis communications issues"
"3 federation history" » "3 migration history", "_ federation history", "5 federation history", "a federation history"
"et cooperation state" » "et cooperation scale", "et operation state", "et cooperation strategy", "et cooperations state", "eu cooperation state", "2 cooperation state"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("mass communications issues") or ("et cooperation state"))) or ("3 federation history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mass communications issues") OR ("et cooperation state"))) OR ("3 federation history")).
• Removing quotes may allow a broader search: (((( mass communications issues ) or ( et cooperation state ))) or ( 3 federation history )).
• Adding a wildcard symbol may retrieve word variants: (((("mass communications issues") or ("et cooperation state"))) or ("3 federation history"))*.