If you want to export your search results manually you can export them as CSV in search app.
If you want to export the results on a daily or weekly basis you can build a scheduled report.
1. Save your search as a report
2. Edit your report as 'Schedule report'
3. Plan your schedule
4. Add Action 'Send as email'
5. Activate 'Attatch CSV' and 'Attatch PDF'
6. Click on 'Save'