Perhaps you should try some spelling variations:
cooperation history » corporation history, federation history
decolonisation from » decolonization from, decolonisation _, decolonisation 1
its decolonisation » _ decolonisation, 4.4 decolonisation, its colonization
colonization still » colonization failed, colonization israel, colonization songs
its cooperation » city cooperation, et cooperation, its corporation
_ colonization » _ decolonization, decolonization _

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((( its decolonisation from ) OR ( _ colonization still ))) OR ( its cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((( its decolonisation from ) or ( _ colonization still ))) or ( its cooperation history ))*.