Perhaps you should try some spelling variations:
"une communication theory" » "une communication technology", "d'une communication theory", "ante communication theory", "de communication theory"
"_ colonization still" » "_ colonization failed", "_ colonization israel", "_ colonization songs"
"re federation history" » "re migration history", "_ federation history", "3 federation history", "5 federation history"

You may be able to get more results by adjusting your search query.

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