Perhaps you should try some spelling variations:
luc ban » duc ban, cuc ban, luc bat
cua tre » cua te, cua triet, dua tren
hanh ve » hanh vi, hanh va, hanh kem
hanh de » hanh kem
cuu tre » cau tren, cau treo
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
ve cau » ke cau, va cau, ve cac
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 hoi. hieu ve cau luc ban ((hanh de) OR (hanh ve)) ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky lang xa hoi. hieu ve cau luc ban ((hanh de) OR (hanh ve)) ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky lang xa hoi. hieu ve cau luc ban ((hanh de) OR (hanh ve)) ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sai ky lang xa hoi. hieu ve cau luc ban ((hanh de) OR (hanh ve)) ((cua tre) or (cuu tre))*.