Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
phan duong » phan xuong, phan dong, han duong
duong may » duong ma, dung may, duong mat
kinh hoc » sinh hoc, hinh hoc, tinh hoc
bach cau » bac cau, bach mai, sach cap
tu sach » thu sach, su sach, te sach
bach co » bach hoa, bach mao, cach con
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 kinh hoc chuyen đe ky thuat: kien thuc ((bach co) OR (bach cau)) phan duong may tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach kinh hoc chuyen đe ky thuat: kien thuc ((bach co) OR (bach cau)) phan duong may tinh".
• Adding a wildcard symbol may retrieve word variants: tu sach kinh hoc chuyen đe ky thuat: kien thuc ((bach co) OR (bach cau)) phan duong may tinh*.