Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van thac » van hac, van tham, van than
thac toc » cac toc, thac cac, thi toc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
toc va » hoc va, toc ta, tuc va
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 ky ((nang x) OR (lang xa)) hoi. hieu van thac toc va hanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang x) or (lang xa)) hoi. hieu van thac toc va hanh vi cua tre*.