Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach tren » sach tien, sach tranh
thuc bach » truc bach, thuc cach, thuoc sach
tren hoc » truyen hoc, trung hoc, triet hoc
bach hoa » bach khoa, bach ha, cach hoan
hoa phan » hoa dan, co phan
cong van » cong vang, cong san, cong tan
song van » hoang van, trong van, duong van
tu sach » thu sach, su sach, te sach
minh » dinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tren hoc chuyen đe ky thuat: kien thuc bach hoa phan ((cong van) or (song van)) minh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tren hoc chuyen đe ky thuat: kien thuc bach hoa phan ((cong van) OR (song van)) minh.
• Adding a wildcard symbol may retrieve word variants: tu sach tren hoc chuyen đe ky thuat: kien thuc bach hoa phan ((cong van) or (song van)) minh*.