The US Medical Library Association Latinx Caucus has created a comprehensive search: Hispanic/Latinx Search Hedges. [2021]
A few terms to get you started: ("Hispanic or Latino"[Mesh] OR Hispanic*[tiab] OR Latino*[tiab] OR Latina*[tiab] OR Latinx[tiab] OR "Mexican American*"[tiab] OR Chicana*[tiab] OR Chicano*[tiab] OR Chicanx[tiab] OR "Puerto Rico"[Mesh] OR "Puerto Rico"[tiab]
Librarians at have developed a search filter for Immigrant Populations in PubMed. There are two filters, one that is specific and one that is sensitive. You can view both filters here.
A few terms to get you started in PubMed include: "Emigrants and Immigrants"[mesh] OR "Emigration and Immigration"[mesh] OR "Refugees"[mesh] OR "Transients and Migrants"[mesh] OR "Undocumented Immigrants"[mesh]
Note that these searches may contain outdated and offensive terms.
Library and Knowledge Service for NHS Ambulance Services in England has created searches for Black and Minority Ethnic (BAME) populations, which can be found here.
Here are a few terms to get you started: