Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
dong cua » dung cua, cong cua, huong cua
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
nam tu » nam thu

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