If you are not able to see the journal titles in your public journal search, one reason could be the valid to dates that were set are now expired. 

Step-by-Step

In JST 3.0 if an agreement has expired and you would like for it to be shown in your JST you will need to change the journal agreement to Active.  See the step-by-step guide below

1. Go to the Agreements page either from the Dashboard or the Side Bar
2. Once you have arrived at the Agreements page you can sort agreements by their status, simply click on the status. Expired will then be grouped together making it easier to see which ones may need updating
   
3. Click on the Agreement you would like to update
4. Edit the Start/End dates by clicking on the date and selecting from the calendar
   
5. Click Save Changes
   
6. The journal list will now be shown in your search