Perhaps you should try some spelling variations:
"jews colonization failed" » "jews colonization still", "jews organizations failed", "its colonization failed", "mars colonization failed", "re colonization failed"
"mars communication iran" » "mass communication iran", "mass communications iran", "markets communication iran", "mars communication iraq", "mars communication ireland", "mars communication brands"
"city cooperation series" » "city cooperation theories", "city cooperation sources", "city cooperation studies", "city corporation series", "china cooperation series", "city corporations series"

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