Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach tren » sach tien, sach tranh
thuc cach » thuoc sach, truoc cach, thuc hanh
sach tin » sach tien, sach kinh, sach han
cach hoa » cach hoan, cach hoc, bach hoa
dan hung » dang hung, doan hung, dan dung
hung han » chung han, hung ha, hung dan
han tinh » hanh tinh, nhan tinh, ha tinh

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 tin) or (sach tren)) hoc chuyen đe ky thuat: kien thuc cach hoa dan hung han tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tin) OR (sach tren)) hoc chuyen đe ky thuat: kien thuc cach hoa dan hung han tinh.
• Adding a wildcard symbol may retrieve word variants: tu ((sach tin) or (sach tren)) hoc chuyen đe ky thuat: kien thuc cach hoa dan hung han tinh*.