Perhaps you should try some spelling variations:
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
cuu tre » cua tre, cau tren, cau treo
tang ma » mang may, tang van
ma hoi » mai hoi, xa hoi, ma hoa
ve cai » ve tai, ve cau
sach 2 » sach y
va cai » va cac, va bai, va dai
ve cac » va cac, vien cac
tu ban » thu ban, te ban
2 tang » 2 thang, 6 tang, 7 tang
vi cuu » vi luu, vinh cuu

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 2 tang ma hoi. hieu ((((ve cai) OR (va cai))) OR (ve cac)) tu ban hanh vi cuu tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach 2 tang ma hoi. hieu ((((ve cai) or (va cai))) or (ve cac)) tu ban hanh vi cuu tre*.