Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
te sach » toc sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
nam duc » nam duoc, pham duc, nam buoc
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
xang xa » mang xa, ang xa, dang xay
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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