Perhaps you should try some spelling variations:
kien thuoc » kien thuc, bien thuoc, trien thuoc
hoc chuyen » khong chuyen
thuoc bach » thuoc sach, thuoc ban, truc bach
sach tien » sach tren, sach thieu
tien hoc » tin hoc, tien hoa, dien hoc
bach hoa » bach khoa, bach ha, cach hoan
dan dang » dang dang, dan dung, da dang
dang may » mang may, dang xay, dung may
su sach » so sach, vu sach
tinh » dinh, minh, kinh

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 tien hoc chuyen đe ky thuat: kien thuoc bach hoa dan dang may (tinh or trinh)~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tien hoc chuyen đe ky thuat: kien thuoc bach hoa dan dang may (tinh OR trinh).
• Adding a wildcard symbol may retrieve word variants: su sach tien hoc chuyen đe ky thuat: kien thuoc bach hoa dan dang may (tinh or trinh)*.