Social work searching can be quite interdisciplinary - cross searching in databases related to medicine, psychology, nursing, and education is not uncommon.
Searching for journal articles, theses/dissertations, conference proceedings, reports, etc.:
Searching for books and items not found in databases:
Grey literature consists of documents produced by government, academic, business or organizations "where publishing is not the primary activity of the producing body." (Greynet)
Examples include annual reports, conference proceedings, technical reports, theses, white papers, and even informal communication such as blogs, emails, or social media posts.