Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach song » sach dung
thuc cach » thuoc sach, truoc cach, thuc hanh
khoa than » khoa luan, hoa tan, kho khan
song hoc » dong hoc, song ho, song hong
hoa thai » hong thai, hoa phan, hoa chat
cong may » cong xay, cong ma, cong hay
tu sach » thu sach, su sach, te sach
tinh » trinh, dinh, minh

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 song hoc chuyen đe ky thuat: kien thuc cach ((khoa than) OR (hoa thai)) cong may tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach song hoc chuyen đe ky thuat: kien thuc cach ((khoa than) OR (hoa thai)) cong may tinh".
• Adding a wildcard symbol may retrieve word variants: tu sach song hoc chuyen đe ky thuat: kien thuc cach ((khoa than) OR (hoa thai)) cong may tinh*.