Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hang vai » hang va, hang tai, hang hai
ban hang » ngan hang
vai cuu » vai cua
dua ban » dia ban, cua ban, qua ban
cuu tre » cua tre, cau tren, cau treo
sach ty » sach y, sach tu, sach thu
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ty hang
va cai » va cac, va bai, va dai
va ca » va cac, va cao, va cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty nang ((mai hoi) or (ma hoa)). hieu ((va ca) OR (va cai)) dua ban hang vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang ((mai hoi) OR (ma hoa)). hieu ((va ca) OR (va cai)) dua ban hang vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang ((mai hoi) or (ma hoa)). hieu ((va ca) OR (va cai)) dua ban hang vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang ((mai hoi) or (ma hoa)). hieu ((va ca) OR (va cai)) dua ban hang vai cuu tre*.