Use AND to connect words that must appear in a document. This *narrows* your search.
hispanic OR latino OR latina OR latinx
Use OR if only one word must appear in a document. This *broadens* your search.
polic*
Use an asterisk to truncate a word and allow for different endings, for example, policy and policies. But use with caution because this example would also retrieve police, policing, etc.
"climate change"
Use quotation marks to enclose a phrase or words that must appear together in a document.