Perhaps you should try some spelling variations:
"its cooperation strategy" » "its conservation strategy", "its population strategy", "its adaptation strategy", "city cooperation strategy", "et cooperation strategy", "its corporation strategy"
"its colonization songs" » "its colonization still", "its colonization work", "its decolonization notes", "anti colonization songs", "jews colonization songs", "mars colonization songs"
"its federation history" » "its migration history", "les federations history", "_ federation history", "3 federation history"

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

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