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