Perhaps you should try some spelling variations:
"thuat sach than ky thuat co hoc" » "thuat lanh than ky thuat co hoc", "thuat san than ky thuat co hoc", "thuat sach tham ky thuat co hoc", "thuat sach han ky thuat co hoc", "thuat sach tranh ky thuat co hoc", "thuat sach than ky thuat do hoc", "thuat sach than ky thuat o hoc"
"tu ban trinh ki thuat toan khoa" » "tu ban tinh ki thuat toan khoa", "tu dan trinh ki thuat toan khoa", "tu van trinh ki thuat toan khoa", "tu ban trinh khi thuat toan khoa", "tu ban trinh ky thuat toan khoa", "tu ban trinh di thuat toan khoa", "thu ban trinh ki thuat toan khoa", "te ban trinh ki thuat toan khoa", "tu ban trinh ki 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: (("thuat sach than ky thuat co hoc") or ("tu ban trinh ki thuat toan khoa"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("thuat sach than ky thuat co hoc") OR ("tu ban trinh ki thuat toan khoa"))*.
• Removing quotes may allow a broader search: (( thuat sach than ky thuat co hoc ) or ( tu ban trinh ki thuat toan khoa ))*.