AS3, Find the string entered in the INPUT text field

(1) How to find a specific row of a Dynamic text field containing a string entered in the INPUT text field and display it in the middle row of the list (about 20 rows are displayed)
(After inputting, do not use the (Enter) key, but use the (→) button)

(2) If there is a way to display the next row that satisfies the above conditions when clicking the next (→) button,
I would greatly appreciate it if you could upload a sample code

iField : textFieldType - INPUT
dField : textFieldType - Dynamic, 1000 numLines over

Thank you