Perhaps you should try some spelling variations:
"pro communication theory" » "pro communication technology", "prone communication theory", "ngo communication theory", "proper communication theory"
"_ colonization israel" » "_ communication israel", "_ colonization still", "_ colonization history"
"its colonization songs" » "its colonization still", "its colonization work", "its decolonization notes", "anti colonization songs", "jews colonization songs", "mars colonization songs"

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 israel") OR ("pro communication theory"))) OR ("its colonization songs"))~.
• Removing quotes may allow a broader search: (((( _ colonization israel ) or ( pro communication theory ))) or ( its colonization songs ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ colonization israel") or ("pro communication theory"))) or ("its colonization songs"))*.