Perhaps you should try some spelling variations:
ban doanh » van doanh, san doanh, toan doanh
cua triet » cua viet, su triet, va triet
sach kem » hanh kem
ban danh » ban hanh, ban dan, van danh
hieu ve » hieu va, hieu van
via cua » gia cua, gian cua, giau cua
x hoi » xa hoi, o hoi, x ho
ve am » va am

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 kem) OR (sach y)) nang x hoi. hieu ve am thuc ((ban doanh) OR (ban danh)) via cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach kem) or (sach y)) nang x hoi. hieu ve am thuc ((ban doanh) OR (ban danh)) via cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach kem) or (sach y)) nang x hoi. hieu ve am thuc ((ban doanh) OR (ban danh)) via cua triet*.