Our search engine wants to match all word entered in the search field.
Lets say seller #1 enters "Crosby" while seller #2 enters "Sidney Crosby"
Here come mister Buyer. If he search for "Crosby" the he will find cards of the two sellers. However if he search for "Sidney Crosby" the he will only find cards of seller #2.
Since on kronozio.com player names are clickable, cards of seller #1 may not appear often.