Hitting the back button return us to the list of books. One thing you might notice in a quick glance down the list is that politics appears in a few of the titles. This is probably because our keyword scien* would produce a match with terms like "political science," "social science," "science fiction" and so on. We can use the boolean operator and not to try to eliminate some of these undesired hits. Let us edit our search string to

postmodern* and scien* and not political science

Another thing to note is that if you enter words next to each other, then they must appear next to each other in the record. In this case we are eliminating records with the exact phrase "political science" but not records with the two terms in different places in the record.

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