Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
thuc bach » truc bach, thuc cach, thuoc sach
kinh hoc » sinh hoc, hinh hoc, tinh hoc
phan ung » phan xuong, phan cong
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
bach co » bach cau, bach hoa, bach mao
ung may » dung may, cung may, mang may
tinh » trinh, 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) OR (su sach)) kinh hoc chuyen đe ky thuat: kien thuc bach co phan ung may (tinh or dinh)~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) kinh hoc chuyen đe ky thuat: kien thuc bach co phan ung may (tinh OR dinh).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) kinh hoc chuyen đe ky thuat: kien thuc bach co phan ung may (tinh or dinh)".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) kinh hoc chuyen đe ky thuat: kien thuc bach co phan ung may (tinh or dinh)*.