Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach tien » sach tren, sach thieu
thuc cach » thuoc sach, truoc cach, thuc hanh
cach hoan » cac khoan, hach toan, sach han
tien hoc » tin hoc, tien hoa, dien hoc
hoan ban » hoang ban, toan ban, hon ban
ban dung » van dung, dan dung, tan dung
may minh » may tinh, mai minh, cao minh
tu sach » thu sach, su sach, te sach

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 tien hoc chuyen đe ky thuat: kien thuc cach hoan ban dung ((may minh) or (van minh))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tien hoc chuyen đe ky thuat: kien thuc cach hoan ban dung ((may minh) OR (van minh)).
• Adding a wildcard symbol may retrieve word variants: tu sach tien hoc chuyen đe ky thuat: kien thuc cach hoan ban dung ((may minh) or (van minh))*.