Perhaps you should try some spelling variations:
kien thuoc » kien thuc, bien thuoc, trien thuoc
hoc chuyen » khong chuyen
thuoc sach » hoc sach, nuoc sach, thuat sach
sach tren » sach tien, sach tranh
tren hoc » truyen hoc, trung hoc, triet hoc
sach hoa » sach ha, sach hoi, bach hoa
hoa phan » hoa dan, co phan
dang may » mang may, dung may, dang mau
dang xay » dang van, van xay
su sach » so sach, vu sach

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 chuyen đe ky thuat: kien thuoc sach hoa phan ((dang may) OR (dang xay)) tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tren hoc chuyen đe ky thuat: kien thuoc sach hoa phan ((dang may) OR (dang xay)) tinh".
• Adding a wildcard symbol may retrieve word variants: su sach tren hoc chuyen đe ky thuat: kien thuoc sach hoa phan ((dang may) OR (dang xay)) tinh*.