Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
dang mat » dang mau, dung mat, dang hat
dang vat » dang van, dong vat, dang nhat
quoc bao » quoc oai, hoc bao, quoc va
te sach » toc sach
hai cua » thai cua, dai cua, hoi cua
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao

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 ky ((dang mat) OR (dang vat)) hoi. hieu va cam ((duc tan) or (quoc bao)) thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((dang mat) OR (dang vat)) hoi. hieu va cam ((duc tan) OR (quoc bao)) thanh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((dang mat) OR (dang vat)) hoi. hieu va cam ((duc tan) or (quoc bao)) thanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((dang mat) OR (dang vat)) hoi. hieu va cam ((duc tan) or (quoc bao)) thanh hai cua tre*.