The Search function appears on the Find and Analyze Data page. You can search the name of a survey or a principal investigator. You can also search by subject and/or keyword. Consult the Thesaurus for social science terminology.
There is also a browse feature. Options include browsing by topic, series, geography.

The search results are a list of datasets and/or documents. Studies with downloadable data will have links to a description and download link. Some studies have segments, with an online analysis link, which have been adapted for the beginning researcher and for classroom use. The related literature link will provide a list of citations for publications based upon the dataset.
If ICPSR does not have the data set you need, consider consulting the "Finding Data For Research" portion of the Datasets and Numeric Data Services guide.