Perhaps you should try some spelling variations:
"de cooperation still" » "de cooperation state", "de cooperation studies", "de cooperation series", "2 cooperation still", "trade cooperation still", "area cooperation still"
"peer cooperation scale" » "peer cooperation case", "peer cooperation state", "peer cooperation sara", "server cooperation scale", "other cooperation scale", "area cooperation scale"
"its colonization work" » "its colonization's mark", "its colonization songs", "its colonization _", "anti colonization work", "jews colonization work", "mars colonization work"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("de cooperation still") or ("peer cooperation scale"))) or ("its colonization work"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("de cooperation still") OR ("peer cooperation scale"))) OR ("its colonization work")).
• Removing quotes may allow a broader search: (((( de cooperation still ) or ( peer cooperation scale ))) or ( its colonization work )).
• Adding a wildcard symbol may retrieve word variants: (((("de cooperation still") or ("peer cooperation scale"))) or ("its colonization work"))*.