Using AND, OR Searching
Connecting keywords with the words AND or an OR will define how the keywords work together.
If you connect keywords with an AND you are telling the database: "the following keywords must be in every article in my results!" For example, Psychology AND Gilman. Every article or book in your search must have the keyword Psychology and the keyword Gilman. If it does not have both keywords, it will not be included in the results. You can search more than two keywords at a time, for example Psychology AND Gilman AND "Yellow Wallpaper." Now all three keywords MUST be in every article or book.
Using OR will tell the database to search for either of the keywords, meaning that only one of the keywords need be present in each result.