Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh de » hanh de, thanh ve, thanh do
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
hieu ve » hieu va, hieu van
xuc ban » duc ban, cuc ban, quoc ban
ma hoi » mai hoi, xa hoi, me hoi
ve cam » ve cham, ve cac, va cam
de cua » le cua, te cua, dieu cua

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 ky sang ((ma hoi) or (ma hoa)). hieu ve cam xuc ban thanh de cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang ((ma hoi) OR (ma hoa)). hieu ve cam xuc ban thanh de cua vat*.