Perhaps you should try some spelling variations:
"its communication israel" » "its communication issues", "its communication iran", "its communication iraq", "nets communication israel", "c's communication israel", "mass communication israel"
"mars colonization failed" » "mars colonization still", "mars organizations failed", "mrsa colonization failed", "its colonization failed", "jews colonization failed"
"city cooperation sources" » "city cooperation series", "city cooperation studies", "city cooperation countries", "city corporation sources", "china cooperation sources", "city corporations sources"

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