How can I attack against three pawns ?
This defense has multiple names depending on the exact opening. One name for this defense is the bogo-indian defense.

see "Pawn Breaks" here...
Pawn Play and Structure - for Beginners and Beyond
https://www.chess.com/blog/RussBell/chess-books-on-pawn-play-and-structure
https://www.chess.com/blog/RussBell