Perhaps you should try some spelling variations:
"class communication israel" » "class communication issues", "class communication iran", "class communication iraq", "mass communication israel", "plans communication israel", "crisis communication israel"
"city cooperation implies" » "city cooperation series", "city cooperation studies", "city cooperation civility", "city corporation implies", "china cooperation implies", "city corporations implies"
"its colonization still" » "its colonization failed", "its colonization israel", "its colonization songs", "anti colonization still", "jews colonization still", "mars 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: (("class communication israel") or ((("its colonization still") or ("city cooperation implies"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("class communication israel") OR ((("its colonization still") OR ("city cooperation implies")))).
• Removing quotes may allow a broader search: (( class communication israel ) or ((( its colonization still ) or ( city cooperation implies )))).
• Adding a wildcard symbol may retrieve word variants: (("class communication israel") or ((("its colonization still") or ("city cooperation implies"))))*.