Even here on DP!

"turbographx" - 242 search results on DP, approx. 12,400 from Google.

"turbographix" - 45 DP, 559 Google.

"turbografix" - 40 DP, 16,900 Google.

"turbographics" - 7 DP, 8,230 Google.

The correct spelling, "turbografx", yielded 500+ results on DP, 996,000 from Google.

This does not consider the combination of two words, as it can't be completely accurate in search yields.