Basic Search is a full-text search. This means that it compares every word of your search phrase with all the values used in all the fields of entries or assets. It then sorts the results based on a robust algorithm created to provide the best-matched results first.
Note: You can use the Entries or Assets option from the drop-down menu located in the left corner of the search bar to narrow down your search results.
These options will help switch between results specific to assets or entries, based on your requirement.