Perhaps you should try some spelling variations:
trien thuoc » trien thuc, trien thuong, tin thuoc
kien thuoc » kien thuc, bien thuoc, kien truc
van chuyen » cau chuyen, van chien
sach tien » sach tren, sach thieu
sach khoa » bach khoa, sach nha, anh khoa
khoa phan » hoa phan, khoa than, khoa phau
tien van » thien van, trien van, tien va
phan ung » phan xuong, phan cong
tu sach » thu sach, su sach, te sach
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 van chuyen đe ky thuat: ((kien thuoc) or (trien thuoc)) sach khoa phan ung may tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tien van chuyen đe ky thuat: ((kien thuoc) OR (trien thuoc)) sach khoa phan ung may tinh*.