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Keyword searches in Words or phrase will retrieve items containing the words together in any one field. This is the broadest type of search, with the highest number of results and the largest number of irrelevant items.
Use AND between search terms to find items with those words in several different labeled fields such as subject and title.
Examples: China AND music; India AND music; Africa AND music; Egypt AND music. Also try replacing "music" with "ethnomusicology."