Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
bat hanh » bat khanh, ban hanh, bao hanh
cua tre » cua te, cuu tre, cua triet
hanh de » hanh ve, hanh kem
luc bat » suc bat, luc nhat, luat bat
cau luc » cau truc, cau phuc
ky dang » ky nang, ky danh
xay hoi » tay hoi, cay phoi, gay thoi
ky cau » ky chau, ke cau
sac ky » cac ky, sai ky
te sac » te sach, te cac, te san

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: te sac ky dang ((xay hoi) OR (xa hoi)). hieu ky cau luc bat hanh de ((cua tre) OR (cau treo))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky dang ((xay hoi) OR (xa hoi)). hieu ky cau luc bat hanh de ((cua tre) or (cau treo))~".
• Adding a wildcard symbol may retrieve word variants: te sac ky dang ((xay hoi) OR (xa hoi)). hieu ky cau luc bat hanh de ((cua tre) or (cau treo))*.