Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
kien thuoc » kien thuc, trien thuoc, kien truc
bien thuoc » bien thuc, trien thuoc, kien thuc
sach khoa » bach khoa, sach nha, anh khoa
khoa phau » hoa phan, khoa kham, khoa than
phau dung » pham dung, phan dung, phan ung
kinh hoc » sinh hoc, hinh hoc, tinh hoc
dung may » dung va, dung tai, mang may
tu sach » thu sach, su sach, te sach
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 kinh hoc chuyen đe ky thuat: ((kien thuoc) or (bien thuoc)) sach khoa phau dung may tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach kinh hoc chuyen đe ky thuat: ((kien thuoc) OR (bien thuoc)) sach khoa phau dung may tinh.
• Adding a wildcard symbol may retrieve word variants: tu sach kinh hoc chuyen đe ky thuat: ((kien thuoc) or (bien thuoc)) sach khoa phau dung may tinh*.