Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
quoc ban » quoc bao, quoc lan, quoc quan
hanh lai » hanh lam, hanh tai, thanh lap
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
xuc ban » cuc ban, xuat ban, buoc ban
duc ban » duc tan, duc van, dua ban
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet

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 tang xa hoi. hieu van cham ((((xuc ban) OR (duc ban))) OR (quoc ban)) hanh lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang xa hoi. hieu van cham ((((xuc ban) OR (duc ban))) or (quoc ban)) hanh lai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang xa hoi. hieu van cham ((((xuc ban) OR (duc ban))) or (quoc ban)) hanh lai cua tre*.