Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
thu sach » tu sach, thuat sach, thuoc sach
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
hanh di » hanh vi, hanh de, hang di
va cau » van cau, va cac, va dau
xuc va » tuc va, luc va, xac va

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: thu sach ky nang xa hoi. hieu va cau ((xuc va) OR (duc va)) hanh di ((cua triet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu va cau ((xuc va) or (duc va)) hanh di ((cua triet) OR (su triet))~".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu va cau ((xuc va) or (duc va)) hanh di ((cua triet) OR (su triet))*.