Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach tien » sach tren, sach thieu
cach khoa » bach khoa, cac khoa, anh khoa
than cung » phan cung, thay cung, tham cung
tien hoc » tin hoc, tien hoa, dien hoc
cung may » dung may, cong may, cung hay
su sach » so sach, vu 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: su sach tien hoc chuyen đe ky thuat: kien thuc ((cach khoa) OR (cac khoan)) than cung may tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tien hoc chuyen đe ky thuat: kien thuc ((cach khoa) OR (cac khoan)) than cung may tinh".
• Adding a wildcard symbol may retrieve word variants: su sach tien hoc chuyen đe ky thuat: kien thuc ((cach khoa) OR (cac khoan)) than cung may tinh*.