Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vat doanh » van doanh, vay doanh, va doanh
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
doanh va » doan va, doanh tai, doanh cua
te sach » toc sach
dang xa » dang xay, dang ha, dang va
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, dua tren

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 van nam thuc vat doanh va ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((dang xa) OR (lang xa)) hoi. hieu van nam thuc vat doanh va ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((dang xa) or (lang xa)) hoi. hieu van nam thuc vat doanh va ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sach y ((dang xa) or (lang xa)) hoi. hieu van nam thuc vat doanh va ((cua tre) OR (cua triet))*.