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
tu sach » thu sach, su sach, te sach
hieu ve » hieu van
cao duc » dao duc, cao suc, giao duc
hieu va » lieu va, hieu qua
sach ly » sach y, sach lo, sach ty
ang xa » lang xa, mang xa, dang xay
ly ang » ly hang, ly vang, ly nang
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 ang xa hoi. ((hieu ve) or (hieu va)) ((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 ang xa hoi. ((hieu ve) OR (hieu va)) ((nam duoc) OR (cao duc)) van thanh dai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ly ang xa hoi. ((hieu ve) or (hieu va)) ((nam duoc) or (cao duc)) van thanh dai cua te*.