Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
ban hang » ngan hang
hang vi » hang va, hanh vi, hang di
tuc ban » thuc ban, truc ban, tu ban
tu sach » thu sach, su sach, te sach
may hoi » may thoi, tay hoi, mai hoi
vi dai » si dai, li dai, vien dai
sach 7 » sach y, sach 2
ve cac » va cac, vien cac
ve cai » va cai, ve tai, ve cau
vi cau » va cau, ve cau, di cau
mang » nang, dang, bang

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: tu sach 7 mang may hoi. hieu ((((ve cai) OR (vi dai))) OR (ve cac)) tuc ban hang vi cau treo~.
• Adding a wildcard symbol may retrieve word variants: tu sach 7 mang may hoi. hieu ((((ve cai) or (vi dai))) or (ve cac)) tuc ban hang vi cau treo*.