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, da duoc, dat duoc
cao duc » dao duc, cao suc, giao duc
vang xa » lang xa, mang xa, ang xa
hieu ve » hieu va, hieu van
sach ly » sach lo, sach ty, sach hay
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: tu ((sach ly) OR (sach y)) vang xa hoi. hieu ve ((nam duoc) or (cao duc)) van thanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ly) OR (sach y)) vang xa hoi. hieu ve ((nam duoc) OR (cao duc)) van thanh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ly) OR (sach y)) vang xa hoi. hieu ve ((nam duoc) or (cao duc)) van thanh dai cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ly) OR (sach y)) vang xa hoi. hieu ve ((nam duoc) or (cao duc)) van thanh dai cua te*.