Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
va doanh » vay doanh, va danh, hoa doanh
hieu ve » hieu va, hieu van
van cua » vang cua, ban cua, dan cua
ve pham » vi pham, v pham, ve phan
co sach » bo sach, cuon sach, hoc sach
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ((ty nang) or (ty hang)) x hoi. hieu ve pham duc ((va doanh) OR (van doanh)) van cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ((ty nang) OR (ty hang)) x hoi. hieu ve pham duc ((va doanh) OR (van doanh)) van cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ((ty nang) or (ty hang)) x hoi. hieu ve pham duc ((va doanh) OR (van doanh)) van cua te".
• Adding a wildcard symbol may retrieve word variants: co sach ((ty nang) or (ty hang)) x hoi. hieu ve pham duc ((va doanh) OR (van doanh)) van cua te*.