Perhaps you should try some spelling variations:
nguoi sach » nguoi san
sach tien » sach tren, sach thieu
hoa huyen » hoi huyen, hoa truyen, hong huyen
nuoc sach » hoc sach, cuoc cach, cuon sach
khoa phan » hoa phan, khoa than, khoa phau
may trinh » may tinh, lap trinh, quy trinh
tien hoa » dien hoa, trien hoat, tien va
phan ung » phan xuong, phan cong
te sach » toc sach
ung may » dung may, cung may, mang may

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach tien hoa huyen đe ky thuat: kien ((nuoc sach) or (nguoi sach)) khoa phan ung may trinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tien hoa huyen đe ky thuat: kien ((nuoc sach) OR (nguoi sach)) khoa phan ung may trinh.
• Adding a wildcard symbol may retrieve word variants: te sach tien hoa huyen đe ky thuat: kien ((nuoc sach) or (nguoi sach)) khoa phan ung may trinh*.