On the basic search page of Web of Science, put your search together one concept at at time. The Topic box on the right, is a dropdown menu that lets you choose from a variety of fields to construct your search. Start off by adding United States and Adolecents to the basic search.
(dietary intake OR food intake) AND (dairy products OR milk products OR yogurt OR cheese) AND (united states) AND adolescents
Below the search boxes,you can choose a date range under Timespan & select or deselect databases.