Perhaps you should try some spelling variations:
"re colonization israel" » "re communication israel", "re colonization still", "re colonization history", "pro colonization israel", "_ colonization israel", "jews colonization israel"
"mass communication iran" » "mass communication iraq", "mass communication ireland", "mass communication brands", "maps communication iran"
"mars migration history" » "mass migration history", "mass migrations history", "gas migration history"

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