I replied in the poll like this, because I think the act of looking for sb is finished. Maybe we could say " I (have) looked for you everywhere, but I couldn't find you." It's just a little difference and not so important.
In addition, we don't see the word "dolaÅŸmak" in the translation. Here is my suggestion :
" I have walked around and looked for you everywhere, but I couldn't find you. "