Perhaps you should try some spelling variations:
"empire decolonization case" » "during decolonization case", "empire decolonial case", "war decolonization case", "empire decolonization across", "empire decolonization notes", "empire decolonization _"
"pro communication theory" » "pro communication technology", "prone communication theory", "ngo communication theory", "proper communication theory"
"_ colonization israel" » "_ communication israel", "_ colonization still", "_ colonization 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 israel") OR ("empire decolonization case"))) OR ("pro communication theory"))~.
• Removing quotes may allow a broader search: (((( _ colonization israel ) or ( empire decolonization case ))) or ( pro communication theory ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ colonization israel") or ("empire decolonization case"))) or ("pro communication theory"))*.