Perhaps you should try some spelling variations:
"so dac thanh ky thuat ban hoc" » "so dao thanh ky thuat ban hoc", "so duc thanh ky thuat ban hoc", "so bac thanh ky thuat ban hoc", "so dac thanh ky thuat bai hoc", "so dac thanh ky thuat bao hoc", "so dac thanh ky thuat san hoc", "so dac hanh ky thuat ban hoc", "so dac than ky thuat ban hoc", "so dac thanh tay thuat ban hoc", "so dac thanh ky thuat bang hoc", "so dac thanh ky thuat van hoc", "so dan thanh ky thuat ban hoc"
"so sach nhat ky thuat toan hoc" » "so sach nha ky thuat toan hoc", "so sach phat ky thuat toan hoc", "so sach tham ky thuat toan hoc", "so sach nhat ky thuat toan khoa", "so sach nhat ky thuat van hoc", "so sach nhat ky thuat hoa hoc", "so sanh nhat ky thuat toan hoc", "bo sach nhat ky thuat toan hoc", "co sach nhat ky thuat toan hoc"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("so dac thanh ky thuat ban hoc") or ("so sach nhat ky thuat toan hoc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("so dac thanh ky thuat ban hoc") OR ("so sach nhat ky thuat toan hoc")).
• Removing quotes may allow a broader search: (( so dac thanh ky thuat ban hoc ) or ( so sach nhat ky thuat toan hoc )).
• Adding a wildcard symbol may retrieve word variants: (("so dac thanh ky thuat ban hoc") or ("so sach nhat ky thuat toan hoc"))*.