Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach tren » sach tien, sach tranh
kien nuoc » bien nuoc, gieng nuoc, bien duoc
nuoc sach » nguoi sach, hoc sach, cuoc cach
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 nuoc sach hoa phan ((dang may) or (dang xay)) tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tren hoc chuyen đe ky thuat: kien nuoc 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 nuoc sach hoa phan ((dang may) or (dang xay)) tinh*.