Search: - Enter text to search using spaces as word's delimiter.
Display results - Specify, how much links on found entries should be shown on single page.
Search conditions

Any word - will be found all entries, where any of specified words exists. This is the most wide search.

All words - will be found all entries, where all of specified words exists in any order

Exact this phrase - will be found all entries, which contains exactly your phrase. This is the most strict search
Search in specified sections - Select site sections to search by checking checkboxes
Period - Only entries for given period (between specified dates) will be shown.