Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
su sach » so sach, vu 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
hieu ve » hieu va, hieu van
xuc ban » cuc ban, quoc ban, xuat ban
duc ban » duc tan, duc van, duc man
dua ban » dia ban, cua ban, qua ban
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky tang xa hoi. hieu ve cam ((xuc ban) or (((duc ban) OR (dua ban)))) thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky tang xa hoi. hieu ve cam ((xuc ban) OR (((duc ban) OR (dua ban)))) thanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky tang xa hoi. hieu ve cam ((xuc ban) or (((duc ban) OR (dua ban)))) thanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky tang xa hoi. hieu ve cam ((xuc ban) or (((duc ban) OR (dua ban)))) thanh dai cua tre*.