Think broadly and abstractly!
Construct search by combining concepts with Boolean operators. Use keywords and subject terms in combination.
Boolean Logic Operators:
|AND||limits results, both concepts||stoma AND bowel cancer|
|OR||more results, either concept||stoma OR colostomy|
|NOT||excludes concept(s) from results||java NOT coffee|
Boolean operators connect your search words together to either narrow or broaden your results in a database (like PubMed) or search engine (like Google Scholar).
Boolean operators are the words "AND", "OR" and "NOT".
Prefer video? Watch Boolean Operators by University of Essex Library
Image from https://www.quora.com/What-makes-Boolean-Algebra-different-than-Binary-Code
Grey literature is information produced outside of traditional publishing and distribution channels. It can include reports, policy literature, working papers, newsletters, government documents, speeches, white papers, urban plans, etc.
Organizations that produce grey literature include government departments and agencies, civil society or non-governmental organizations, academic centers, and private companies and consultants.
Open access system in Europe which contains grey literature bibliographical references produced in Europe.
Bimonthly publication of The New York Academy of Medicine produced between 1999-2016 (discontinued January 2017)
The Medical Subject Headings (MeSH) is a comprehensive controlled vocabulary for the purpose of indexing journal articles and books in the life sciences. It serves as a thesaurus that helps with searching.
Take the National Institutes of Health's interactive tutorial on MeSH