Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
kien thuoc » kien thuc, bien thuoc, trien thuoc
tien hoa » dien hoa, trien hoat
nha phan » nha phat, phap phan, nghe phan
phan ung » phan xuong, phan cong
tu sach » thu sach, su sach, te sach
tien va » dien va, thien van
ung may » dung may, cung may, mang may
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 hoa) or (tien va)) chuyen đe ky thuat: kien thuoc sach nha phan ung may tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tien hoa) OR (tien va)) chuyen đe ky thuat: kien thuoc sach nha phan ung may tinh.
• Adding a wildcard symbol may retrieve word variants: tu sach ((tien hoa) or (tien va)) chuyen đe ky thuat: kien thuoc sach nha phan ung may tinh*.