Perhaps you should try some spelling variations:
"mass communication issues" » "mass community issues", "mass communication india", "mass communication united", "maps communication issues"
"mars colonization history" » "mars communication history", "mars organization history", "mars cooperation history", "mrsa colonization history", "its colonization history", "jews colonization history"
"mass communication iraq" » "mass communication iran", "mass communication israel", "mass communication italy", "maps communication iraq"

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