Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
te sach » toc sach
tu cham » toc cham, thi cham
dinh vi » dinh ve, dinh viet, dinh tri
danh vi » hanh vi, danh di, danh va
hieu tu » chieu tu, hieu tuc, hien tu
van hoi » van hoa, van hoc, van hoe
cua tre » cua te, cuu tre, cua triet
o tang » do tang, 7 tang, 5 tang

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 ((o tang) OR (6 tang)) van hoi. hieu tu cham duc va ((danh vi) OR (dinh vi)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((o tang) OR (6 tang)) van hoi. hieu tu cham duc va ((danh vi) or (dinh vi)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ((o tang) OR (6 tang)) van hoi. hieu tu cham duc va ((danh vi) or (dinh vi)) cua tre*.