Perhaps you should try some spelling variations:
"china cooperation history" » "china corporation history", "china federation history", "asian cooperation history", "regional cooperation history"
"its colonization songs" » "its colonization still", "its colonization work", "its decolonization notes", "anti colonization songs", "jews colonization songs", "mars colonization songs"
"its cooperation still" » "its cooperation scale", "its cooperation state", "its cooperation studies", "city cooperation still", "et cooperation still", "its corporation still"

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 still"))) or ("china cooperation history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("its colonization songs") OR ("its cooperation still"))) OR ("china cooperation history"))*.
• Removing quotes may allow a broader search: (((( its colonization songs ) or ( its cooperation still ))) or ( china cooperation history ))*.