isn't much use
No sirve de mucho, ¿no?
It's not very useful, is it?
— Juego sangriento [バトル・ロワイアル] (2000)
Llorar no sirve de mucho.
Crying doesn’t help much.
No sirve de mucho comerse el teclado.
It's not much use eating the keyboard.
Este diccionario no sirve de mucho.
This dictionary isn't very useful.