Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
va thanh » gia thanh, ban thanh, va tinh
thanh du » thanh de, thanh do, thanh tu
so sach » so sanh, bo sach, co sach
sach tu » sach thu, cach tu, sach ty
xang xa » lang xa, mang xa, ang xa
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
ve cac » va cac, vien cac
du cua » duy cua, dau cua, dum cua
cua cu » cua chu, cua cau, cua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach tu ((xang xa) or (lang van)) hoi. hieu ve cac duc va thanh du cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tu ((xang xa) OR (lang van)) hoi. hieu ve cac duc va thanh du cua cu.
• Adding a wildcard symbol may retrieve word variants: so sach tu ((xang xa) or (lang van)) hoi. hieu ve cac duc va thanh du cua cu*.