Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
lam duoc » nam duoc, luat duoc, lam thuoc
duoc van » duoc va, duc van, duoc ban
thanh de » hanh de, thanh ve, thanh do
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
va lam » van lam, va lap
de va » de van, te va, ke va

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 y ((nang ma) or (tang ma)) hoi. lieu va lam duoc van thanh de va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang ma) OR (tang ma)) hoi. lieu va lam duoc van thanh de va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang ma) or (tang ma)) hoi. lieu va lam duoc van thanh de va triet*.