Perhaps you should try some spelling variations:
kien thuoc » kien thuc, bien thuoc, trien thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
trung hoc » trung quoc
tren hoc » truyen hoc, triet hoc, tren thuc
sach hoa » sach ha, sach hoi, bach hoa
hoa nhan » hoa phan, hoa han, hoa nhap
nhan dan » phan dau, gian dan, nhan tai
su sach » so sach, vu sach
dan may » dam may, dan tay, dat 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: su sach ((tren hoc) OR (trung hoc)) chuyen đe ky thuat: kien thuoc sach hoa nhan dan may tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tren hoc) OR (trung hoc)) chuyen đe ky thuat: kien thuoc sach hoa nhan dan may tinh".
• Adding a wildcard symbol may retrieve word variants: su sach ((tren hoc) OR (trung hoc)) chuyen đe ky thuat: kien thuoc sach hoa nhan dan may tinh*.