Perhaps you should try some spelling variations:
ban doanh » van doanh, san doanh, toan doanh
cac thuc » cach thuc, cac thu, can thuc
ban danh » ban hanh, ban dan, van danh
hieu van » hieu va, thien van, lieu va
bo sach » co sach, hoc sach
van cac » van hac, van cau, van bac
nang ma » tang ma, sang ma, nang cao
lang xa » lang ha, dang xay, lang van
vi cua » vai cua, di cua
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach y ((lang xa) or (nang ma)) hoi. hieu van cac thuc ((ban doanh) OR (ban danh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach y ((lang xa) OR (nang ma)) hoi. hieu van cac thuc ((ban doanh) OR (ban danh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach y ((lang xa) or (nang ma)) hoi. hieu van cac thuc ((ban doanh) OR (ban danh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: bo sach y ((lang xa) or (nang ma)) hoi. hieu van cac thuc ((ban doanh) OR (ban danh)) vi cua te*.