Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
cac tuc » cac toc, cac tu, cac tac
va nang » van nang, da nang, kha nang
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
ve cac » va cac, vien cac
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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 lang xa hoi. hieu ve cac tuc ((va nang) OR (cam nang)) ji ((cua triet) OR (va triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky lang xa hoi. hieu ve cac tuc ((va nang) or (cam nang)) ji ((cua triet) OR (va triet))~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang xa hoi. hieu ve cac tuc ((va nang) or (cam nang)) ji ((cua triet) OR (va triet))*.