Perhaps you should try some spelling variations:
thanh dinh » thanh binh, thanh tinh, thanh vinh
hieu van » hieu va, thien van, lieu va
dang xay » van xay
dang van » hoang van, hang va
van cac » van hac, van cau, van bac
dinh cu » dinh cuu, dinh chuc, dinh chau
te sach » toc sach
sach ky » sac ky, sach y, sach ty
xuc va » duc va, tuc va, luc va
cu tre » cu tren, cua tre, cuu tre

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 ky ((dang xay) or (dang van)) hoi. hieu van cac ((xuc va) or (thuc vat)) thanh dinh cu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((dang xay) OR (dang van)) hoi. hieu van cac ((xuc va) OR (thuc vat)) thanh dinh cu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((dang xay) or (dang van)) hoi. hieu van cac ((xuc va) or (thuc vat)) thanh dinh cu tre*.