You may need to take a different approach when searching for grey literature compared to searching for formal research studies through databases. This is because the search interfaces where you find grey literature can be very basic and won't have the same advanced search functionalities.
Many databases include grey literature such as conference proceedings and reports but you may need to refine your search to retrieve these, see below for two examples of databases:
The largest abstract and citation database of international peer-reviewed literature: journals, books and conference proceedings. It also has smart tools to track, analyse and visualise research.
Multidisciplinary resource which enables simultaneous cross-searching of a range of citation indexes and databases. It provides access to research tools like cited reference searching and the Journal Citation Reports.
Preprint servers are online archives, or repositories, containing works or data associated with various scholarly papers that are not yet peer reviewed or accepted by traditional academic journals.
Database of multi-disciplinary dissertations and theses (UK And Ireland).
Register online with Senate House for remote access.
Available for University of London students and staff with current Senate House Library or School of Advanced Study cards.
These resources provide research from policy experts, think tanks, inter-governmental and non-governmental organisations.
A think tank is a body of experts that performs research and provides advice and ideas in specific areas. They cover topics relating to social, economic and political issues. Information is available through their own reports, expert commentaries and analysis, blogs and videos. Examples include: The Adam Smith Institute, the Fabian Society, Demos.
See the lists below for further examples:
Websites of professional bodies and organisations (and societies) are a good source of grey literature such as reports and bulletins. Many organisations also provide details of the latest research in their area. These are usually found on search engines such as Google.
They can also be a source of primary research as many list their own publications which may not be available through the databases you search.
Many charities undertake research and produce their own bulletins and reports.
Social media is often used by professionals, academics and researchers to communicate and share ideas. You can use social media to find information from resources such as blogs, podcasts, forums and reviews.