Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
truc ban » thuc ban, truc van, truoc bang
truc dan » thuc dan, tuc dan, truc dai
cuu tre » cua tre, cau tren, cau treo
hanh de » hanh ve, hanh kem
lang xa » lang ha, dang xay, lang van
hieu ke » hieu kem, chieu ke, hieu ky
ky lang » ky nang, ky dang, ky tang
tai ky » thai ky, trai ky, sai ky
ke cau » ket cau

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 tai ky lang xa hoi. hieu ke cau ((truc ban) OR (truc dan)) hanh de ((cua triet) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te tai ky lang xa hoi. hieu ke cau ((truc ban) OR (truc dan)) hanh de ((cua triet) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: te tai ky lang xa hoi. hieu ke cau ((truc ban) OR (truc dan)) hanh de ((cua triet) or (cuu tre))*.