Perhaps you should try some spelling variations:
hang tai » hang va, dung tai
ban hang » ngan hang
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
tai cua » thai cua, tai cuc, tri cua
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
tang ma » mang may, tang van
va cao » va cac, va co, va dao
va cam » va cham, va cac, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tu ((tang ma) or (lang xa)) hoi. hieu ((va cam) OR (va cao)) duc ban hang tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu ((tang ma) OR (lang xa)) hoi. hieu ((va cam) OR (va cao)) duc ban hang tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu ((tang ma) or (lang xa)) hoi. hieu ((va cam) OR (va cao)) duc ban hang tai cua tre*".