Perhaps you should try some spelling variations:
cooperation history » corporation history, federation history
decolonization from » decolonisation from, decolonization africa, decolonization across
its decolonization » its colonization, _ decolonization, box decolonization
colonization still » colonization failed, colonization israel, colonization songs
city cooperation » city corporation, china cooperation, city corporations
_ 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 decolonization from ) OR ( _ colonization still ))) OR ( city cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((( its decolonization from ) or ( _ colonization still ))) or ( city cooperation history ))*.