The search history is displayed at the bottom of the screen. Click the check box to the left of each search to be combined. Select the Boolean operator AND or OR . Click Combine Checked . Search specific fields or parts of a record.
Field names vary from database to database.
To combine two concepts select the Boolean operator AND , OR or NOT . Click Start Search . Display a list of searchable terms . This alphabetical list of potential search terms is useful for checking the spelling of a term and searching authors and journal names. It displays the number of records containing the term.