Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
vu nang » vuc nang, va nang, vu dang
van cac » van hac, van cau, van bac
duc ban » duc tan, duc van, dua ban
hanh ve » hanh vi, hanh va, hanh kem
su sach » so sach, vu sach
v nang » va nang, van nang, voi nang
x hoi » xa hoi, o hoi, x ho
ve su » va su

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: su sach ((v nang) OR (vu nang)) x hoi. hieu van cac ((duc ban) OR (cua ban)) hanh ve su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((v nang) OR (vu nang)) x hoi. hieu van cac ((duc ban) or (cua ban)) hanh ve su triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ((v nang) OR (vu nang)) x hoi. hieu van cac ((duc ban) or (cua ban)) hanh ve su triet*.