Perhaps you should try some spelling variations:
"su sach hanh ky thuat o hoc" » "su sach danh ky thuat o hoc", "su sach han ky thuat o hoc", "su sac hanh ky thuat o hoc", "so sach hanh ky thuat o hoc", "vu sach hanh ky thuat o hoc", "su sach hanh kem thuat o hoc", "su sach hanh ky thuat do hoc", "su sach hanh ky thuat co hoc", "su sach hanh ky thuat mo hoc", "su sach hanh ky thuat so hoc"
"thu lanh dao ky thuat toan khoa" » "thu canh dao ky thuat toan khoa", "thi lanh dao ky thuat toan khoa", "thu anh dao ky thuat toan khoa", "thu lanh cao ky thuat toan khoa", "thu lanh dan ky thuat toan khoa", "thu lanh do ky thuat toan khoa", "thu lanh dao 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: (("su sach hanh ky thuat o hoc") or ("thu lanh dao ky thuat toan khoa"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("su sach hanh ky thuat o hoc") OR ("thu lanh dao ky thuat toan khoa"))*.
• Removing quotes may allow a broader search: (( su sach hanh ky thuat o hoc ) or ( thu lanh dao ky thuat toan khoa ))*.