Perhaps you should try some spelling variations:
hanh dinh » thanh dinh, hinh dinh, hanh tinh
hieu van » hieu va, thien van, lieu va
te sach » toc sach
dinh cu » dinh cuu, dinh chuc, dinh chau
van cac » van hac, van cau, van bac
ky dang » ky danh
xuc va » duc va, tuc va, luc va
tay ho » tay co, tay o, tay khao
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) or (ky nang)) tay ho. hieu van cac ((xuc va) or (thuc vat)) hanh dinh cu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky dang) OR (ky nang)) tay ho. hieu van cac ((xuc va) OR (thuc vat)) hanh dinh cu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((ky dang) or (ky nang)) tay ho. hieu van cac ((xuc va) or (thuc vat)) hanh dinh cu tre*.