Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh de » hanh de, thanh ve, thanh do
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
xuc ban » duc ban, cuc ban, quoc ban
ma hoi » mai hoi, xa hoi, ma hoa
ve cai » va cai, ve cac, ve tai
va cam » va cham, va cac, va cao
de cua » le cua, te cua, dieu cua

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: vu sach ky nang ma hoi. hieu ((ve cai) OR (va cam)) xuc ban thanh de cua vat~.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang ma hoi. hieu ((ve cai) or (va cam)) xuc ban thanh de cua vat*.