Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh de » hanh de, thanh ve, thanh do
thanh di » thanh doi, thanh do, thanh dinh
ly nang » ky nang, ly hang, ly vang
sach ly » sach y, sach lo, sach ty
va cao » va cac, va co, va dao
va cam » va cham, va cac, va cai
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 nang x hoi. lieu ((va cam) OR (va cao)) duc va ((thanh di) or (thanh de)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ly nang x hoi. lieu ((va cam) OR (va cao)) duc va ((thanh di) OR (thanh de)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ly nang x hoi. lieu ((va cam) OR (va cao)) duc va ((thanh di) or (thanh de)) cua te".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ly nang x hoi. lieu ((va cam) OR (va cao)) duc va ((thanh di) or (thanh de)) cua te*.