https://insights.stackoverflow.com/survey/2020#technology-programming-scripting-and-markup-languages-all-respondents

While in TIOBE index, which is based on search engine traffic, C just overtook Java. These two have been the top two languages since 2002.

https://www.tiobe.com/tiobe-index/

How that can be explained?

Note that I am asking which language is better. I am trying to understand why these two are so different. Because how what programmers tell in a survey be so different from what they google?