Perhaps you should try some spelling variations:
communication israel » communication issues, communication iran, communication iraq
cooperation history » corporation history, federation history
colonization songs » colonization still, colonization work, decolonization notes
china cooperation » asian cooperation, regional cooperation
its colonization » anti colonization, jews colonization, mars colonization
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 cooperation history ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( its colonization songs ) OR ( mass communication israel ))) OR ( china cooperation history )).
• Adding a wildcard symbol may retrieve word variants: (((( its colonization songs ) or ( mass communication israel ))) or ( china cooperation history ))*.