Perhaps you should try some spelling variations:
kien thuoc » kien thuc, bien thuoc, trien thuoc
hoc chuyen » khong chuyen
sach tren » sach tien, sach tranh
cach hoan » cac khoan, hach toan, cac hoat
may trinh » may tinh, lap trinh, quy trinh
tren hoc » truyen hoc, trung hoc, triet hoc
sach han » sach tham, sach danh, sach nang
phan dau » phan tu, hang dau
su sach » so sach, vu sach
dau may » dam may, dat may, dau cay

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