Perhaps you should try some spelling variations:
communication israel » communication issues, communication iran, communication iraq
colonization songs » colonization still, colonization work, decolonization notes
federation history » migration history
its colonization » anti colonization, jews colonization, mars colonization
china federation » chicago federation, china cooperation, china integration
mass » maps

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 songs ) or ( mass communication israel ))) or ( china federation history ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( its colonization songs ) OR ( mass communication israel ))) OR ( china federation history )).
• Adding a wildcard symbol may retrieve word variants: (((( its colonization songs ) or ( mass communication israel ))) or ( china federation history ))*.