Perhaps you should try some spelling variations:
"mass communication united" » "mass telecommunication united", "maps communication united"
"class communication israel" » "class communication issues", "class communication iran", "class communication iraq", "plans communication israel", "crisis communication israel", "causes communication israel"
"2 migration history" » "der migration history"

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 united") or ("class communication israel"))) or ("2 migration history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mass communication united") OR ("class communication israel"))) OR ("2 migration history")).
• Removing quotes may allow a broader search: (((( mass communication united ) or ( class communication israel ))) or ( 2 migration history )).
• Adding a wildcard symbol may retrieve word variants: (((("mass communication united") or ("class communication israel"))) or ("2 migration history"))*.