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
sach sinh » sach kinh, sach danh, sach song
sach khoa » bach khoa, sach nha, anh khoa
khoa than » khoa luan, hoa thai, hoa tan
than cong » thanh cong, thuan cong, phan cong
thu sach » tu sach, thuat sach, thu hoach
cong may » cong xay, cong ma, cong hay
tinh » dinh, minh, kinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach sinh hoc chuyen đe ky thuat: kien thuoc sach khoa than cong may (tinh or trinh)~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach sinh hoc chuyen đe ky thuat: kien thuoc sach khoa than cong may (tinh OR trinh).
• Adding a wildcard symbol may retrieve word variants: thu sach sinh hoc chuyen đe ky thuat: kien thuoc sach khoa than cong may (tinh or trinh)*.