Perhaps you should try some spelling variations:
van doanh » toan doanh, van thanh, van anh
te sach » toc sach
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
cua cuu » cua chu, cua cau, cua cu
cuu tre » cua tre, cau tren, cau treo
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
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 v nang ((me hoi) or (ma hoa)). hieu va cac tuc ((van doanh) or (van dong)) cua cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang ((me hoi) OR (ma hoa)). hieu va cac tuc ((van doanh) OR (van dong)) cua cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach v nang ((me hoi) or (ma hoa)). hieu va cac tuc ((van doanh) or (van dong)) cua cuu tre*.