Perhaps you should try some spelling variations:
"pro polarization references" » "pro globalization references", "pro variation references", "pro collaboration references", "spin polarization references", "_ polarization references", "12 polarization references"
"re communication theory" » "re communication technology", "de communication theory", "true communication theory", "une communication theory"
"_ colonization israel" » "_ communication israel", "_ colonization still", "_ colonization history", "_ decolonization israel", "decolonization _ israel"

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