Did you solve this?
There are a number of possibilities to consider:
- The text is part of the Laravel package which isn't in the scope of directories you are searching.
- You are using a module that has its source code encoded in some kind of way for security/anti piracy.
- One of the characters in "gteway" is Cyrillic which is not a standard alphabetic character but still looks the same.
I assume the screen grab is from a browser rendered page. Try selecting the text and searching for it, not just typing it into the search box.
Is the page cached, have you reloaded the page while clearing cache.