Perhaps you should try some spelling variations:
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
va hanh » van hanh, va thanh, va danh
cua tre » cuu tre, cua triet, dua tren
te cac » tu cac, te cao, de cac
ve cac » va cac, vien cac
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 cac ky nang x hoi. hieu ve cac luc ((dia ban) OR (va hanh)) di ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky nang x hoi. hieu ve cac luc ((dia ban) or (va hanh)) di ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: te cac ky nang x hoi. hieu ve cac luc ((dia ban) or (va hanh)) di ((cua tre) OR (cua te))*.