Perhaps you should try some spelling variations:
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
va hanh » van hanh, va thanh, va danh
cua tre » cuu tre, cua triet, dua tren
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve cao » va cao, ve bao, ve 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: tu sac ky nang x hoi. hieu ve cao duc ((va hanh) OR (may tinh)) dai ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang x hoi. hieu ve cao duc ((va hanh) or (may tinh)) dai ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang x hoi. hieu ve cao duc ((va hanh) or (may tinh)) dai ((cua tre) OR (cua te))*.