Perhaps you should try some spelling variations:
ban danh » ban doanh, ban hanh, ban dan
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cua cua » cua chua, ca cua, qua cua
va cua » va chua, via cua, ca cua
cua te » cua tu
toan » tran

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 lang xa hoi. hieu va cua cua ((ban danh) or (toan doanh)) vai ((cua te) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. hieu va cua cua ((ban danh) OR (toan doanh)) vai ((cua te) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. hieu va cua cua ((ban danh) or (toan doanh)) vai ((cua te) or (su triet))*.