Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cuu tre » cau tren, cau treo
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu van
cua tre » cua te, cua triet, dua tren
hieu va » lieu va, hieu qua
hanh de » hanh ve, hanh kem
cau luc » cau truc, cau phuc
luc van » luoc van, luu van, duc van
te lai » te tai, te bai
lai ky » sai ky, dai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te lai ky lang xa hoi. ((hieu ve) OR (hieu va)) cau luc van hanh de ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te lai ky lang xa hoi. ((hieu ve) OR (hieu va)) cau luc van hanh de ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te lai ky lang xa hoi. ((hieu ve) OR (hieu va)) cau luc van hanh de ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te lai ky lang xa hoi. ((hieu ve) OR (hieu va)) cau luc van hanh de ((cua tre) or (cuu tre))*.