Narrowly focused on social work journals - may not cover all topics, but everything will have a social work focus. Start with this database, and add others that relate to your topic by clicking on the Choose Databases link near the top of the page.
A collaboration between the National Association of Social Workers (NASW Press) and Oxford University Press (OUP), the encyclopedia provides overview of topics from a social work perspective, including statistics and interventions. These entries don't count as peer-reviewed journal articles but they can point you to some and provide ideas for how to search for more.
Widen Your Search/Find an Article From a Citation
The Library Search box and Google Scholar both search a wide array of resources, from many different disciplines. They are also useful to locate the full text of specific citations from an article you already have - put in the article's title, and hit search!