Perhaps you should try some spelling variations:
ban doanh » van doanh, san doanh, toan doanh
thu sach » thuat sach, thuoc sach, thu hoach
chu nang » chuc nang, chua nang, cuu nang
ban danh » ban hanh, ban dan, van danh
cao cua » ca cua, co cua, cau cua
hieu va » lieu va, hieu qua
tu sach » su sach, te sach, tu cach
cuu tre » cua tre, cau tren, cau treo
va cao » va cac, va co, va dao
du cuu » tu cuu
x hoi » xa hoi, o hoi, x ho

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: ((thu sach) OR (tu sach)) chu nang x hoi. hieu va cao cua ((ban danh) OR (ban doanh)) du cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (tu sach)) chu nang x hoi. hieu va cao cua ((ban danh) OR (ban doanh)) du cuu tre~".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) chu nang x hoi. hieu va cao cua ((ban danh) OR (ban doanh)) du cuu tre*.