Perhaps you should try some spelling variations:
chieu ke » hieu ky, hieu ve, hieu kem
ban hanh » ban hang
dang xay » dang van
hanh de » hanh ve, hanh kem
luc ban » duc ban, cuc ban, luc bat
cau luc » cau truc, cau phuc
su sach » vu sach
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
ke cau » ket cau
de cua » le cua, te cua, dieu cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky ((dang xay) OR (van xay)) hoi. chieu ke cau luc ban hanh de cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ky ((dang xay) OR (van xay)) hoi. chieu ke cau luc ban hanh de cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky ((dang xay) OR (van xay)) hoi. chieu ke cau luc ban hanh de cua tre*.