Google Scholar is a search engine that covers scholarly literature, including peer-reviewed papers, theses, books, abstracts and technical reports from broad areas of research.
You can use Google Scholar to find articles from a wide variety of academic publishers, professional societies, as well as scholarly articles available from across the web.
You can take advantage of Sheffield Hallam subscriptions by using this 'Google Scholar with SHULinks' search. This will add a SHULinks link to your Google Scholar searches, which will identify what you can get through Hallam subscriptions.
Be aware that Google Scholar will also find results from sources to which Sheffield Hallam does not subscribe, so you might not always be able to get to the full text.