That is not possible. Reason being that the displayed text is not a simple string but taken from the data structure. A text contains text language entries, i.e. translations of a text for each language of the game.
What you could do is display a value in your text, e.g.
in your script you can set the string value which will be displayed in the text,e.g.
getObject("Values[text_bla]"):setValue(VValueString, 'scrambled text...')
If your game is multilingual you have to take care of this yourself by testing the current language and setting the value accordingly.