Perhaps you should try some spelling variations:
decolonization models » decolonization notes, decolonization across, decolonization case
communication history » telecommunication history, communication sector, communication theory
colonization history » organization history, cooperation history, civilization history
mars decolonization » mars colonization, war decolonization, empire decolonization
pro colonization » bio colonization, re colonization, mars colonization

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

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