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

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