Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
ve triet » va trien, su triet
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va cham » va chat, va tham
soc van » hoc van, oc van, sac van
hanh di » hanh vi, hanh de, hang di
tu van » tu va
thiet » thieu

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 van ky lang xa hoi. lieu va cham soc van hanh di ((ve triet) OR (va thiet))~.
• Adding a wildcard symbol may retrieve word variants: tu van ky lang xa hoi. lieu va cham soc van hanh di ((ve triet) or (va thiet))*.