Perhaps you should try some spelling variations:
va doanh » van doanh, vay doanh, va danh
te sach » toc sach
dang xa » dang xay, dang ha, dang va
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
va nam » van nam, ha nam, va nay
thu va » thuc va, thue va, tu va

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 y ((dang xa) or (lang xa)) hoi. hieu va nam thu va doanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((dang xa) OR (lang xa)) hoi. hieu va nam thu va doanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach y ((dang xa) or (lang xa)) hoi. hieu va nam thu va doanh tai cua tre*.