Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
phan xuong » phan cong
sach tien » sach tren, sach thieu
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoa » bach khoa, cac khoa, cac khoan
khoa phan » hoa phan, khoa than, khoa phau
xuong may » cuong ma, xuong nau, duong ma
tien hoc » tin hoc, tien hoa, dien hoc
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 tien hoc chuyen đe ky thuat: kien thuc cach khoa phan xuong may (kinh or dinh)~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tien hoc chuyen đe ky thuat: kien thuc cach khoa phan xuong may (kinh OR dinh).
• Adding a wildcard symbol may retrieve word variants: tu sach tien hoc chuyen đe ky thuat: kien thuc cach khoa phan xuong may (kinh or dinh)*.