Perhaps you should try some spelling variations:
kien thuoc » kien thuc, bien thuoc, trien thuoc
hoc chuyen » khong chuyen
sach tien » sach tren, sach thieu
phan dang » phan dau, phan cong, nhan dan
tien hoc » tin hoc, tien hoa, dien hoc
dang may » mang may, dang xay, dung may
vu sach » vu bach, su sach, vu khach
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: vu sach tien hoc chuyen đe ky thuat: kien thuoc ((sach dao) OR (lanh dao)) phan dang may tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach tien hoc chuyen đe ky thuat: kien thuoc ((sach dao) OR (lanh dao)) phan dang may tinh".
• Adding a wildcard symbol may retrieve word variants: vu sach tien hoc chuyen đe ky thuat: kien thuoc ((sach dao) OR (lanh dao)) phan dang may tinh*.