Keyword searching (generally) works best for finding articles on a topic
If you get too many results, try limiting to a particular subject - usually there is a list of subject links on one side of the screen.
The same tricks to help you find books in the catalog, will help you find articles
(cybersecurity or cyber security)
wifi and bluetooth
produc* (finds produce, produces, product, production, etc.)
Put it all together:
(cybersecurity or "cyber security") and wifi