Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
te sach » toc sach
ly nang » ky nang, ly hang, ly vang
nam tuc » nam thuc, nam truc, nam tu
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, v nang, may nang
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ly nang)) ma hoa. ((hieu van) OR (lieu va)) nam tuc va hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) OR (ly nang)) ma hoa. ((hieu van) or (lieu va)) nam tuc va hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) OR (ly nang)) ma hoa. ((hieu van) or (lieu va)) nam tuc va hanh vi cua tre*.