Perhaps you should try some spelling variations:
va triet » va trien, ve triet, cua triet
toc sac » toc sach, toc san, hoc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va dinh » van dinh, va kinh, va tinh
dinh vi » dinh ve, dinh viet, dinh tri
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
cua te » cua tu
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: toc sac ky nang xa hoi. hieu va cam duc va dinh vi ((cua te) OR (((va triet) OR (va thiet))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky nang xa hoi. hieu va cam duc va dinh vi ((cua te) or (((va triet) OR (va thiet))))~".
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang xa hoi. hieu va cam duc va dinh vi ((cua te) or (((va triet) OR (va thiet))))*.