Perhaps you should try some spelling variations:
"its cooperation history" » "its corporation history", "its federation history", "city cooperation history", "et cooperation history"
"its decolonization _" » "_ decolonization _", "box decolonization _", "war decolonization _", "its colonization _"
"its colonization songs" » "its colonization still", "its colonization work", "its decolonization notes", "anti colonization songs", "jews colonization songs", "mars colonization songs"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("its decolonization _") or ("its colonization songs"))) or ("its cooperation history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("its decolonization _") OR ("its colonization songs"))) OR ("its cooperation history"))*.
• Removing quotes may allow a broader search: (((( its decolonization _ ) or ( its colonization songs ))) or ( its cooperation history ))*.