Perhaps you should try some spelling variations:
"re colonization history" » "re communication history", "re organization history", "re cooperation history", "pro colonization history", "_ colonization history", "jews colonization history"
"de communication iran" » "de communication iraq", "de communication ireland", "de communication brands", "mobile communication iran", "online communication iran"
"free organization theory" » "force organization theory", "green organization theory", "three organization theory"

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