Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
va thanh » gia thanh, ban thanh, le thanh
van cua » vang cua, ban cua, dan cua
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
sach ly » sach y, sach lo, sach ty
vang xa » lang xa, mang xa, ang xa
ly vang » ly hang, ly van, ly quang
va dai » va dao, vi dai, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ly vang xa hoi. hieu ((va dai) or (va cac)) xuc ((va thanh) OR (va tinh)) van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ly vang xa hoi. hieu ((va dai) OR (va cac)) xuc ((va thanh) OR (va tinh)) van cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ly vang xa hoi. hieu ((va dai) or (va cac)) xuc ((va thanh) OR (va tinh)) van cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ly vang xa hoi. hieu ((va dai) or (va cac)) xuc ((va thanh) OR (va tinh)) van cua tre*.