Perhaps you should try some spelling variations:
class communication » mass communication, plans communication, crisis communication
cooperation studies » cooperation series, cooperation sources, cooperation implies
communication iraq » communication iran, communication israel, communication italy
colonization still » colonization failed, colonization israel, colonization songs
jews colonization » its colonization, mars colonization, re colonization
city cooperation » city corporation, china cooperation, city corporations

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( class communication iraq ) or ((( jews colonization still ) or ( city cooperation studies ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( class communication iraq ) OR ((( jews colonization still ) OR ( city cooperation studies )))).
• Adding a wildcard symbol may retrieve word variants: (( class communication iraq ) or ((( jews colonization still ) or ( city cooperation studies ))))*.