Perhaps you should try some spelling variations:
thieu nien » thien nhien
thu sach » thuat sach, thuoc sach, thu hoach
hanh hoi » hanh thoi, hanh noi, hanh hoa
nien cau » hien cau, nien dau, khien cau
hoi cua » hoi chuc
va hanh » van hanh, va thanh, va danh
cau tuc » cau truc, cau tu, cau luc
tu sach » su sach, te sach, tu cach
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa

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) or (thu sach)) ky ((nang xa) or (lang xa)) hoi. thieu nien cau tuc va hanh hoi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky ((nang xa) OR (lang xa)) hoi. thieu nien cau tuc va hanh hoi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky ((nang xa) or (lang xa)) hoi. thieu nien cau tuc va hanh hoi cua tre*.