Perhaps you should try some spelling variations:
colonization history » communication history, organization history, cooperation history
communication theory » communication technology
decolonization notes » decolonization models, decolonization case, decolonization indonesia
mars decolonization » mars colonization, war decolonization, empire decolonization
ngo communication » togo communications, de communication, 3 communication

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((( _ colonization history ) or ( ngo communication theory ))) or ( mars decolonization notes ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( _ colonization history ) OR ( ngo communication theory ))) OR ( mars decolonization notes )).
• Adding a wildcard symbol may retrieve word variants: (((( _ colonization history ) or ( ngo communication theory ))) or ( mars decolonization notes ))*.