Perhaps you should try some spelling variations:
kien thuoc » kien thuc, bien thuoc, trien thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
sach tren » sach tien, sach tranh
sach khoa » bach khoa, sach nha, anh khoa
khoa phan » hoa phan, khoa than, khoa phau
phan cung » phan cong, phan ung, phan xuong
sach tin » sach tien, sach kinh, sach han
cung may » dung may, cong may, cung hay
tinh » trinh, dinh, minh

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach tin) or (sach tren)) khong chuyen đe ky thuat: kien thuoc sach khoa phan cung may tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tin) OR (sach tren)) khong chuyen đe ky thuat: kien thuoc sach khoa phan cung may tinh.
• Adding a wildcard symbol may retrieve word variants: tu ((sach tin) or (sach tren)) khong chuyen đe ky thuat: kien thuoc sach khoa phan cung may tinh*.