Perhaps you should try some spelling variations:
kien thuoc » kien thuc, bien thuoc, trien thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
thien van » thi van
sach khoa » bach khoa, sach nha, anh khoa
khoa phan » hoa phan, khoa than, khoa phau
phan ung » phan xuong, phan cong
tu sach » thu sach, su sach, te sach
tien va » dien va
ung may » dung may, cung may, mang may
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 ((tien va) or (thien van)) chuyen đe ky thuat: kien thuoc sach khoa phan ung may tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tien va) OR (thien van)) chuyen đe ky thuat: kien thuoc sach khoa phan ung may tinh.
• Adding a wildcard symbol may retrieve word variants: tu sach ((tien va) or (thien van)) chuyen đe ky thuat: kien thuoc sach khoa phan ung may tinh*.