Perhaps you should try some spelling variations:
africa colonization » arrival colonization, africa cooperation, africa organization
mars colonization » mrsa colonization, jews colonization, pro colonization
its colonization » anti colonization, jews colonization, mrsa colonization
neo colonialism » neo colonialisms, from colonialism, anti colonialism

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((((its colonization) or (((africa colonization) or (neo colonialism))))) or (mars colonization))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((its colonization) OR (((africa colonization) OR (neo colonialism))))) OR (mars colonization)).
• Adding a wildcard symbol may retrieve word variants: ((((its colonization) or (((africa colonization) or (neo colonialism))))) or (mars colonization))*.