Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
vu sach » vu bach, su sach, vu khach
tai cua » thai cua, tai cuc, tri cua
dao duc » giao duc, tao duoc
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
ly nang » ky nang, ly hang, ly quang
ly vang » ly hang, ly van, ly quang
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ly nang) OR (ly vang)) x hoi. hieu ve ((cam duc) OR (dao duc)) van doanh tai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ly nang) OR (ly vang)) x hoi. hieu ve ((cam duc) or (dao duc)) van doanh tai cua te~".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ly nang) OR (ly vang)) x hoi. hieu ve ((cam duc) or (dao duc)) van doanh tai cua te*.