Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
van thanh » ban thanh, van tuan
nam duoc » nam thuoc, dat duoc, nam moc
te sach » toc sach
vang xa » lang xa, mang xa, ang xa
hieu ve » hieu va, hieu van
da duoc » tao duoc, hoa duoc
cao duc » dao duc, cao suc, giao duc
y vang » ly vang
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y vang xa hoi. hieu ve ((((nam duoc) OR (da duoc))) or (cao duc)) van thanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y vang xa hoi. hieu ve ((((nam duoc) OR (da duoc))) OR (cao duc)) van thanh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y vang xa hoi. hieu ve ((((nam duoc) OR (da duoc))) or (cao duc)) van thanh dai cua te".
• Adding a wildcard symbol may retrieve word variants: te sach y vang xa hoi. hieu ve ((((nam duoc) OR (da duoc))) or (cao duc)) van thanh dai cua te*.