How Can I Fix Set text Value ?

Not really clear what you are trying to replace as you have two replaces going on there, but the normal format will be:

replace(Text, Find, Replacement-Txt)

Example:

Here we have a Global Variable Text and has as a Value = "Apple Orange Banana"

If we want to replace the word "Orange" with "Fruits" we will do:

Set Var Text To: replace(Text, "Orange", "Fruits")

The result will end up like this:

"Apple Fruits Banana"