Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
ban thanh » ban hanh, ban hang
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
hai cua » thai cua, dai cua, hoi cua
duc ban » duc tan, duc van, dua ban
hieu ve » hieu van
sach ky » sac ky, sach y, sach ty
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
cua tre » cua te, cuu tre, cua triet
hieu v » hieu 2, hieu _, hieu y

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 ky tang xa hoi. ((hieu v) OR (((hieu ve) OR (hieu va)))) pham duc ban thanh hai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky tang xa hoi. ((hieu v) or (((hieu ve) OR (hieu va)))) pham duc ban thanh hai cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ky tang xa hoi. ((hieu v) or (((hieu ve) OR (hieu va)))) pham duc ban thanh hai cua tre*.