Perhaps you should try some spelling variations:
doanh cua » doanh luan
van doanh » toan doanh, van dong, van thanh
cua cua » cua chua, ca cua, qua cua
tuc van » thuc van, truc van, tuc va
cac tuc » cac toc, cac tu, cac tac
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
sach va » sach ha, sach dao, sach nha
sach xa » sach dao, sach nha, sach bai
me hoi » le hoi

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

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