Data Citation Index
On the main search screen, scroll down to click on "More Settings", and choose the indexes you wish to search through.
"Data Citation Index provides access to research data from repositories across disciplines and around the world. Through linked content and summary information, this data is displayed within the broader context of the scholarly research, enabling users to gain perspective that is lost when data sets or repositories are viewed in isolation. These connections allow researchers to access an array of data across subjects and regions."