Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
van thanh » ban thanh, van tuan
cuc tieu » muc tieu, cac tieu, cach tieu
nam duoc » nam thuoc, da duoc, dat duoc
cao duc » dao duc, cao suc, giao duc
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
hieu ve » hieu va, hieu van
vang xa » lang xa, mang xa, ang xa
ly vang » ly hang, ly van, ly quang
cuc te » cua te, cuc thue

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