Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
dang xay » dang van, van xay
thanh va » thanh van, hanh va, thanh ha
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
van cac » van hac, van cau, van bac
lang xa » lang ha, lang van
cua tre » cua te, cuu tre, cua triet
cac ly » cac ky, cac le, cam ly
ly ban » uy ban, lo ban, ly bai
va cua » va chua, via cua, ca cua

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 ((lang xa) or (dang xay)) hoi. hieu van cac ly ban thanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((lang xa) OR (dang xay)) hoi. hieu van cac ly ban thanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((lang xa) or (dang xay)) hoi. hieu van cac ly ban thanh va cua tre*.