Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
te sach » toc sach
san cua » sang cua, ban cua, dan cua
cao duc » dao duc, cao suc, giao duc
hieu ve » hieu va, hieu van
sach ly » sach y, sach lo, sach ty
nang ma » tang ma, sang ma, mang may
cua te » cua tu

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

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