Sometimes you don't want to add filters to find something as it can be complicated and you just want to find some record by text containing in it. On top of each Collection List page there is always a Search Bar as on screen below. Just type in the keyword you want to search for and search will automatically filter and show you the records you are looking for.

Search function will take your keyword and search it against each text field of all the records in this Collection and 1 level deep Related Collections.