Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
nam xuc » nam xua, nam thuc, nam duoc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
y dang » ky dang, 2 dang, _ dang
b dang » 2 dang, _ dang, o dang
va cua » va chua, via cua, ca 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 ((y dang) or (b dang)) ma hoa. hieu van ((nam xuc) or (cam xuc)) va hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y dang) OR (b dang)) ma hoa. hieu van ((nam xuc) OR (cam xuc)) va hanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((y dang) or (b dang)) ma hoa. hieu van ((nam xuc) or (cam xuc)) va hanh va cua tre*.