A boolean search allows you to be more specific with your search terms. By using the upper-case AND, OR and NOT
keywords, you can find jobs with some but not all of the words. For example, "green AND engineer OR nuclear" will find
jobs which contain either the two words "green" and "engineer", or the single word "nuclear", all into one list. Similarly,
"engineer NOT nuclear" will find engineer positions that do not include the word "nuclear".