Perhaps you should try some spelling variations:
"c's communication theory" » "c's communication technology", "lea's communication theory", "class communication theory", "mass communication theory"
"africa colonization israel" » "arrival colonization israel", "africa cooperation israel", "africa organization israel", "africa communication israel", "africa colonization still", "africa 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("africa colonization israel") or ("its colonization songs"))) or ("c's communication theory"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("africa colonization israel") OR ("its colonization songs"))) OR ("c's communication theory"))*.
• Removing quotes may allow a broader search: (((( africa colonization israel ) or ( its colonization songs ))) or ( c's communication theory ))*.