Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
ve triet » va trien
dang xay » dang van, van xay
viec cac » vien cac, viec cua, viec lam
su triet » su tien
so sach » so sanh, bo sach, co sach
hanh va » hang va, hanh vi
su viet » so viet
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
cac thu » cach thuc, cac thoi
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
thu va » thuc va, thue va, tu 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: so sach ky dang xay hoi. hieu viec cac thu va hanh va ((((su triet) OR (ve triet))) OR (su viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky dang xay hoi. hieu viec cac thu va hanh va ((((su triet) OR (ve triet))) or (su viet))~".
• Adding a wildcard symbol may retrieve word variants: so sach ky dang xay hoi. hieu viec cac thu va hanh va ((((su triet) OR (ve triet))) or (su viet))*.