TOXNET does not allow limiting results by age or by types of articles.
TOXLINE and DART searches can be limited by author, title, publication year and by language. Use the Advanced Search option. Visit TOXLINE/DART Help for more information on using limits in TOXLINE.
The other TOXNET databases have limits specific to each database. The fields available vary by database. When you click on the Advanced Search tab you will see the fields available for that database. You can use as many or as few fields as desired. If the search term does not appear in those fields, you will get a message that "No records were found".