Perhaps you should try some spelling variations:
"mars communication iraq" » "mass communication iraq", "mass communications iraq", "markets communication iraq", "mars communication iran", "mars communication israel", "mars communication italy"
"eu cooperation series" » "eu cooperation theories", "eu cooperation sources", "eu cooperation studies", "et cooperation series", "2 cooperation series", "la cooperation series"
"_ federation history" » "_ migration history", "_ federalism history", "_ federated history"

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

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