Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va thanh » gia thanh, va tinh, le thanh
sach thu » sach thue, sach thieu, sach tham
tu sach » thu sach, su sach, te sach
tai cua » thai cua, tai cuc, tri cua
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
tang ma » mang may, tang van
cua tre » cua te, cuu tre, cua triet
co duc » co duoc, cao duc, do duc
va co » vo co

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 thu ((tang ma) or (lang xa)) hoi. hieu va co duc ((va thanh) OR (ban thanh)) tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu ((tang ma) OR (lang xa)) hoi. hieu va co duc ((va thanh) OR (ban thanh)) tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thu ((tang ma) or (lang xa)) hoi. hieu va co duc ((va thanh) OR (ban thanh)) tai cua tre*".