Perhaps you should try some spelling variations:
nhien viet » nhin viet, nghiep viet, trien viet
thieu nien » thien nhien
thanh toan » thanh hoa, thanh san, tinh toan
sach duoc » sach nuoc, sach dao, sach dung
duoc gia » duoc giao, quoc gia, duc gia
toan cua » than cua, tan cua, doanh cua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
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: tu sach ky lang xa hoi. ((thieu nien) or (nhien viet)) sach duoc gia thanh toan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. ((thieu nien) OR (nhien viet)) sach duoc gia thanh toan cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. ((thieu nien) or (nhien viet)) sach duoc gia thanh toan cua tre*.