Perhaps you should try some spelling variations:
hieu ket » hieu kem, thien ket, lien ket
dua tren » dung tren
ban hanh » ban hang
dang xay » dang van, van xay
hanh de » hanh ve, hanh kem
luc ban » duc ban, cuc ban, luc bat
cau luc » cau truc, cau phuc
cuu tre » cua tre, cau tren, cau treo
lang xa » lang ha, lang van
sai ky » sac ky
te sai » te tai, te bai, te lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky ((lang xa) or (dang xay)) hoi. hieu ket cau luc ban hanh de ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky ((lang xa) OR (dang xay)) hoi. hieu ket cau luc ban hanh de ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sai ky ((lang xa) or (dang xay)) hoi. hieu ket cau luc ban hanh de ((dua tren) or (cuu tre))*.