Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thanh hai » thanh phan, thanh hoa, thanh san
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
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, cua triet
hieu v » hieu va, hieu ve, hieu 2
v pham » vi pham, d pham

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 v pham duc ban ((thanh hai) or (thanh toan)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky tang xa hoi. hieu v pham duc ban ((thanh hai) OR (thanh toan)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky tang xa hoi. hieu v pham duc ban ((thanh hai) or (thanh toan)) cua tre*.