Perhaps you should try some spelling variations:
thieu nien » thien nhien
nien cac » vien cac, dien cac, bien cac
sach ky » sac ky, sach ty, sach kem
dinh ca » dinh cac, dinh cua, dinh cao
va dinh » van dinh, va kinh, va tinh
cac xuc » cam xuc, cac nuoc, chat xuc
nang xa » lang xa, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sach y)) ((nang xa) OR (nang x)) hoi. thieu nien cac xuc va dinh ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) ((nang xa) OR (nang x)) hoi. thieu nien cac xuc va dinh ca cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) ((nang xa) OR (nang x)) hoi. thieu nien cac xuc va dinh ca cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) ((nang xa) OR (nang x)) hoi. thieu nien cac xuc va dinh ca cua tre*.