Words matter! As you do your research, keep a running list of possible new search terms you find. Notice that some authors might use one term to describe something, and some authors might use a different term to describe the same thing, or something very similar. These are synonyms. Sometimes synonyms mean the exact same thing, and sometimes one of them may be slightly narrower or more specific, while the other is broader. But the basic idea of what they represent is essentially the same.
Yup'ik OR Eskimo language
"Day of the Dead" OR "Dia de los Meurtos"