Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
dao duc » giao duc, tao duoc
tai cua » thai cua, tai cuc, tri cua
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
sach ly » sach y, sach lo, sach hay
cam duc » cam xuc, cao duc, pham duc
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: vu ((sach ly) OR (sach ty)) nang xa hoi. hieu ve ((cam duc) or (dao duc)) van doanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ly) OR (sach ty)) nang xa 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) OR (sach ty)) nang xa hoi. hieu ve ((cam duc) or (dao duc)) van doanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: vu ((sach ly) OR (sach ty)) nang xa hoi. hieu ve ((cam duc) or (dao duc)) van doanh tai cua te*.