Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cac thu » cach thuc, cac thoi
van cac » van hac, van cau, van bac
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
so sanh » do sanh
thu va » thuc va, thue va, tu 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: ((su sach) OR (so sanh)) y ((nang xa) OR (nang x)) hoi. hieu van cac thu va danh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) y ((nang xa) OR (nang x)) hoi. hieu van cac thu va danh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) y ((nang xa) OR (nang x)) hoi. hieu van cac thu va danh vi cua tre*.