"antywhere" -> "anywhere".
They are a little different.
"It's nowhere to be found" is more a poetic way of saying "I can't seem to find it". For example, "Ugh, I give up. My keys, they are nowhere to be found."
"It can't be found anywhere" is usually closer to meaning it either never existed, or it doesn't exist anymore. Like "Twinkies were discontinued. They can't be found anywhere."