Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
duc ban » duc tan, duc van, dua ban
xuc ban » cuc ban, quoc ban, xuat ban
te sach » toc sach
hieu ve » hieu va
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua

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