And & OR
Combine search terms with AND to narrow a search. exercise AND "academic success" will look for articles that contain both words. Used for tying the PICO elements together.
Combine search terms with OR to expand a search: exercise OR "physical activity" will look for articles that contain either word. Used for tying synonyms together.
Phrase Searching
Use "quotation marks" to search for a phrase. "physical activity" will look for the two words directly adjacent together. physical activity will look for each word individually anywhere in the article.