You can search for a specific journal here.
This search page can be found by going to the library homepage clicking Collections along the top of the page and then choosing E-journals from the dropdown list.
You can then search for the specific journal you want but as there are so many you need to make sure you type in the exact title of the journal to find it.
When you find the journal you want there will be a full text option underneath the title which you can expand and you may be given a choice of databases which hold the journal, when you choose one you should be able to find the year then the issue and the volume you are looking for (the year, issue and volume details can be found in the reference of any article).
Articles can also be searched directly through Discovery so you can try this before going to the specific journal.