Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
kien thuoc » kien thuc, bien thuoc, trien thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
phan xuong » phan cong
sach sinh » sach kinh, sach danh, sach song
sach mach » sach danh, ranh mach, sach bac
mach phan » cach pha, dich phan, sach phat
xuong may » cuong ma, xuong nau, duong ma
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 sinh hoc chuyen đe ky thuat: kien thuoc sach mach phan xuong may (trinh or dinh)~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach sinh hoc chuyen đe ky thuat: kien thuoc sach mach phan xuong may (trinh OR dinh).
• Adding a wildcard symbol may retrieve word variants: tu sach sinh hoc chuyen đe ky thuat: kien thuoc sach mach phan xuong may (trinh or dinh)*.