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"
"nets communication iran" » "lea's communication iran", "mass communication iran", "c's communication iran", "nets communication iraq", "nets communication ireland", "nets communication brands"
"re cooperation state" » "re cooperation scale", "re operation state", "re cooperation strategy", "de cooperation state", "area cooperation state", "rate cooperation state"

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