Keywords: You can search for "Central Asia" using the Colby catalog, and refine by location (Miller stacks? Bates or Bowdoin? Ebooks?).
Subjects: If searching by "subject," try "Asia, Central". Other subjects to try could be:
If you'd like to browse the shelves, do a search and write down the "call numbers" of a few books. You are also likely to find some books on Eurasia in these very broad sections: