Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, lang van
nam duc » nam duoc, pham duc, nam thuc
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
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 ((dang xay) or (lang xa)) hoi. hieu van nam duc va danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((dang xay) OR (lang xa)) hoi. hieu van nam duc va danh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty ((dang xay) or (lang xa)) hoi. hieu van nam duc va danh vi cua tre*.