Use the wildcard and truncation symbols to create searches where there are unknown characters, multiple spellings or various endings. Neither the wildcard nor the truncation symbol can be used as the first character in a search term.
For example, “Academic Performance”; “Online Learning”
OR retrieves records that contain any of the search terms. It expands the search. Therefore, use OR in between terms that are synonyms. For example, Academic Performance OR Educational Achievement.
AND returns records that include all search terms. It narrows or limits the scope of the search For example, Academic Performance AND University Students
NOT eliminates records that contain a specific keyword or phrase. It narrows or limits the search. To exclude search terms from results, use NOT. For example, University NOT Secondary school.