Google Research Datasets - https://datasetsearch.research.google.com/
This is a Google research tool - search engine that searches a select body of dataset pages. Typing a keyword into the search filed will show dataset specific results relating to that keyword.
Entering Key words like literacy, Covid, AI, will take you through to a range of databases, generally externally hosted
The dataset search is both browseable and searchable.
The dataset uses a Google like search that just focusses on searching
The Google like search retrieves search results, linking through to external web hosted data sets