Perhaps you should try some spelling variations:
sach trung » mach trung, sach thuong, sach dung
hoc chuyen » khong chuyen
kien thuoc » kien thuc, trien thuoc, kien truc
bien thuoc » bien thuc, trien thuoc, kien thuc
trung hoc » trung quoc
phan cong » thanh cong
hay trinh » hanh trinh, may tinh, lap trinh
cong hay » cong ha, cong xay, cong hai
so sach » so sanh, bo sach, co sach
bach ha » bac ha, bich ha, sach ha
ha phan » hoa phan, hai phan, va phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach trung hoc chuyen đe ky thuat: ((kien thuoc) OR (bien thuoc)) bach ha phan cong hay trinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach trung hoc chuyen đe ky thuat: ((kien thuoc) OR (bien thuoc)) bach ha phan cong hay trinh".
• Adding a wildcard symbol may retrieve word variants: so sach trung hoc chuyen đe ky thuat: ((kien thuoc) OR (bien thuoc)) bach ha phan cong hay trinh*.