Perhaps you should try some spelling variations:
"so sach nganh ky thuat toan khoa" » "so sach ngan ky thuat toan khoa", "so sach tranh ky thuat toan khoa", "so cac nganh ky thuat toan khoa", "so sach nganh y thuat toan khoa", "so sach nganh xay thuat toan khoa", "so sach hanh ky thuat toan khoa", "so sanh nganh ky thuat toan khoa", "bo sach nganh ky thuat toan khoa", "hoc sach nganh ky thuat toan khoa"
"co sach trinh ky thuat tran khoa" » "co sach tranh ky thuat tran khoa", "co hanh trinh ky thuat tran khoa", "co sach kinh ky thuat tran khoa", "co sach trinh ky thuat trang khoa", "co sach trinh ky thuat than khoa", "co sach trinh ky thuat tren khoa", "co sach trinh ky thuat san khoa", "co sach trinh ky thuat nhan khoa", "co sach trinh ky thuat van khoa", "bo sach trinh ky thuat tran khoa", "cuon sach trinh ky thuat tran khoa", "hoc sach trinh ky thuat tran khoa"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("so sach nganh ky thuat toan khoa") or ("co sach trinh ky thuat tran khoa"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("so sach nganh ky thuat toan khoa") OR ("co sach trinh ky thuat tran khoa"))*.
• Removing quotes may allow a broader search: (( so sach nganh ky thuat toan khoa ) or ( co sach trinh ky thuat tran khoa ))*.