Perhaps you should try some spelling variations:
"so danh thanh ky thuat ban hoc" » "so dinh thanh ky thuat ban hoc", "so dang thanh ky thuat ban hoc", "so nhanh thanh ky thuat ban hoc", "so danh thanh ky thuat bai hoc", "so danh thanh ky thuat bao hoc", "so danh thanh ky thuat san hoc", "so danh hanh ky thuat ban hoc", "so danh than ky thuat ban hoc", "so danh thanh tay thuat ban hoc", "do danh thanh ky thuat ban hoc", "so sanh thanh ky thuat ban hoc", "so dan thanh ky thuat ban hoc", "so danh thanh ky thuat bang hoc", "so danh thanh ky thuat van hoc"
"so sach nhan ky thuat toan khoa" » "so sach nha ky thuat toan khoa", "so sach han ky thuat toan khoa", "so sach ngan ky thuat toan khoa", "so sanh nhan ky thuat toan khoa", "bo sach nhan ky thuat toan khoa", "co sach nhan ky thuat toan khoa", "so sach nhan y thuat toan khoa", "so sach nhat ky thuat toan khoa", "so sach than ky thuat toan khoa", "so sach nhan 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 danh thanh ky thuat ban hoc") or ("so sach nhan ky thuat toan khoa"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("so danh thanh ky thuat ban hoc") OR ("so sach nhan ky thuat toan khoa")).
• Removing quotes may allow a broader search: (( so danh thanh ky thuat ban hoc ) or ( so sach nhan ky thuat toan khoa )).
• Adding a wildcard symbol may retrieve word variants: (("so danh thanh ky thuat ban hoc") or ("so sach nhan ky thuat toan khoa"))*.