Perhaps you should try some spelling variations:
"plans communication iran" » "class communication iran", "mass communication iran", "lea's communication iran", "plans communication iraq", "plans communication ireland", "plans communication brands"
"city cooperation studies" » "city cooperation series", "city cooperation sources", "city cooperation implies", "city corporation studies", "china cooperation studies", "city corporations studies"
"jews colonization still" » "jews colonization failed", "jews colonization israel", "jews colonization songs", "its colonization still", "mars colonization still", "re colonization still"

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: (("plans communication iran") or ((("jews colonization still") or ("city cooperation studies"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("plans communication iran") OR ((("jews colonization still") OR ("city cooperation studies")))).
• Removing quotes may allow a broader search: (( plans communication iran ) or ((( jews colonization still ) or ( city cooperation studies )))).
• Adding a wildcard symbol may retrieve word variants: (("plans communication iran") or ((("jews colonization still") or ("city cooperation studies"))))*.