You can search for specific file types in Google, for example CSV files for datasets. By typing into Google filetype:csv in the search bar you are "telling" Google to only search for things that have that specific file type. For example: (poverty AND ohio) filetype:xls will result in XLS (Excel) files mentioning Poverty in Ohio.
Limit search results by web domain by typing into Google: site:.gov (YOUR TOPIC HERE) . This will limit datasets, files, etc. from specific websites. You could even do .org for professional organizations.