Perhaps you should try some spelling variations:
kien thuoc » kien thuc, bien thuoc, trien thuoc
hoc chuyen » khong chuyen
thuoc sach » hoc sach, nuoc sach, thuat sach
sach tren » sach tien, sach tranh
sach khoa » bach khoa, sach nha, anh khoa
khoa phan » hoa phan, khoa than, khoa phau
phan cung » phan cong, phan ung, phan xuong
tren hoc » truyen hoc, trung hoc, triet hoc
cung may » dung may, cong may, cung hay
tu sach » thu sach, su sach, te sach

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 tren hoc chuyen đe ky thuat: kien thuoc sach khoa phan cung may (minh or dinh)~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tren hoc chuyen đe ky thuat: kien thuoc sach khoa phan cung may (minh OR dinh).
• Adding a wildcard symbol may retrieve word variants: tu sach tren hoc chuyen đe ky thuat: kien thuoc sach khoa phan cung may (minh or dinh)*.