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 _"
"_ communication theory" » "_ communication technology"
"pro colonization israel" » "pro communication israel", "pro colonization still", "pro colonization history", "bio colonization israel", "re colonization israel", "mars colonization 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: (((("_ communication theory") OR ("pro colonization israel"))) OR ("empire decolonization case"))~.
• Removing quotes may allow a broader search: (((( _ communication theory ) or ( pro colonization israel ))) or ( empire decolonization case ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ communication theory") or ("pro colonization israel"))) or ("empire decolonization case"))*.