Boolean searching allows you to customize how you search for things in academic databases, and it's based on a few key pieces of syntax: AND, OR, NOT, (), and "".
When you put two terms into an academic database, AND is usually implied: You usually want both words in Muslim women to appear in your search results. You could just as easily write:
Muslim AND women
OR and ""
But let's say that I want to find something about childhood in revolutionary America. If I want articles that cover young children and teenagers/adolescents I can do the following:
children OR adolescents AND "revolutionary America"
What this tells my database is that I don't care which term appears in the results. I just want one of them. In addition, I want revolutionary America to be searched as a phrase. (This also works in Google with song lyrics.)
What if I'm looking for women in STEM (science, engineering, mathematics, and technology) fields, though? Try it. You'll see a lot of resources on stem cells. This is where the NOT operator is helpful:
women stem NOT cell NOT "clinical trial" NOT "stem cells"