Perhaps you should try some spelling variations:
"mass communication issues" » "mass community issues", "mass communication india", "mass communication united", "maps communication issues"
"_ colonization israel" » "_ communication israel", "_ colonization still", "_ colonization history", "_ decolonization israel", "decolonization _ israel"
"mars colonization songs" » "mars colonization still", "mars colonization work", "mars decolonization notes", "mrsa colonization songs", "its colonization songs", "jews colonization songs"

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