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
phan dang » phan dau, phan cong, nhan dan
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, dang xay, dung may
vu sach » vu bach, su sach, vu khach
tinh » dinh, minh

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tren hoc chuyen đe ky thuat: kien thuoc sach hoa phan dang may ((tinh OR kinh) OR trinh)~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach tren hoc chuyen đe ky thuat: kien thuoc sach hoa phan dang may ((tinh OR kinh) or trinh)~".
• Adding a wildcard symbol may retrieve word variants: vu sach tren hoc chuyen đe ky thuat: kien thuoc sach hoa phan dang may ((tinh OR kinh) or trinh)*.