Web of Science is a set of interdisciplinary databases, so that you can easily search both science & social science literature at the same time.
Web of Science is not indexed, so you'll need to use more synonyms to try to fully search for a topic.
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.
With only 38 results, it's clear that you will need to add more synonyms to the search.
On the Abstract page, you can find not only the abstract, but also KeyWords Plus, which can help you revise your search. The Citation Network box shows how often this article has been cited by another article in this same database. Cited reference searching lets you look into the future in the same way that a list of references in an article lets you look into the past.