Perhaps you should try some spelling variations:
colonization history » communication history, organization history, cooperation history
decolonisation from » decolonization from, decolonisation _, decolonisation 1
re decolonisation » _ decolonisation, 4.4 decolonisation, _ decolonization
re colonization » pro colonization, _ colonization, jews colonization

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( re decolonisation from ) OR ( decolonization _ still ))) OR ( re colonization history ))~".
• Adding a wildcard symbol may retrieve word variants: (((( re decolonisation from ) OR ( decolonization _ still ))) OR ( re colonization history ))*.