Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thanh de » hanh de, thanh ve, thanh do
thanh te » thanh ve, thanh le, thanh tu
cham xuc » cam xuc, chat xuc, cham soc
hieu tu » chieu tu, hieu tuc, lieu tu
hien tu » khien tu, dien tu
sach ky » sac ky, sach y, sach ty
xuc van » duc van, luc van, vuc van
tang ha » lang ha, tang ma, trung ha
ky tang » ky nang, ky dang, kho tang
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky tang ha noi. ((hieu tu) or (hien tu)) cham xuc van ((thanh te) OR (thanh de)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky tang ha noi. ((hieu tu) OR (hien tu)) cham xuc van ((thanh te) OR (thanh de)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky tang ha noi. ((hieu tu) or (hien tu)) cham xuc van ((thanh te) OR (thanh de)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky tang ha noi. ((hieu tu) or (hien tu)) cham xuc van ((thanh te) OR (thanh de)) cua tre*.