Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach tien » sach tren, sach thieu
thuc bach » thuc cach, thuoc sach, thuc hanh
khoa kham » kho khan, khoa than
kham cung » kham xung, tham cung, pham cong
tien hoc » tin hoc, tien hoa, dien hoc
cung may » dung may, cong may, cung 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 tien hoc chuyen đe ky thuat: kien ((thuc bach) OR (truc bach)) khoa kham cung may tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tien hoc chuyen đe ky thuat: kien ((thuc bach) OR (truc bach)) khoa kham cung may tinh".
• Adding a wildcard symbol may retrieve word variants: tu sach tien hoc chuyen đe ky thuat: kien ((thuc bach) OR (truc bach)) khoa kham cung may tinh*.