Searching words with commas will treat the comma as OR
sea OR spray
finds results contains with either the word sea or spray or both
Entering the words without commas treats the words as a phrase so
sea spray
finds all results with the exact phrase "sea spray"
sea NOT spray
finds all results containing sea but not spray
sea AND spray
finds all results with both words
enter sea? to match any single character
...finds seas, seat, seam
Enter sea* to match many (or zero) characters
...finds sea, seas, seat, seaside, seaspray, season