Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
dau tuc » dau tu, dao tuc, cau truc
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, ma hoa, me hoi
va dau » va dao
tuc va » thuc va, truc va, tuc xa

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 sach ky nang ((ma hoi) OR (xa hoi)). hieu va dau tuc va hanh kem ((cua triet) OR (cua viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((ma hoi) or (xa hoi)). hieu va dau tuc va hanh kem ((cua triet) OR (cua viet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((ma hoi) or (xa hoi)). hieu va dau tuc va hanh kem ((cua triet) OR (cua viet))*.