Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec cac » vien cac, viec cua, viec lam
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
nuoc van » nuoc va, nuoc san, luoc van
van hanh » van thanh, ban hanh, van anh
ve triet » su triet
va trien » va truyen, va thiet, va tuyen
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang xa hoi. hieu viec cac nuoc van hanh vi ((ve triet) OR (va trien))~".
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. hieu viec cac nuoc van hanh vi ((ve triet) OR (va trien))*.