it takes two to tango = if two people were involved in a bad situation, both must be responsible / the active cooperation of both parties is needed

You’re always saying it’s your wife who is destroying your relationship. But, you know, it takes two to tango.

It Takes Two To Tango

 

to strike a chord = create an emotional response (букв. взять аккорд)

The speake seems to have struck a chord with his audience.

Once again, however, he discovered he had struck a chord with ordinary people.

To Strike A Chord

 

to play by ear = to improvise

I am not sure what materials I’m going to share at the workshop. I guess I’ll just play it by ear.

To Play By Ear

 

to make a song and dance about something = to make something seem more important than it really is so that everyone notices it

— Your cooking is so bad!
-Will you stop making a song and dance about it?

To Make A Song And Dance

 

to go for a song = to be sold very cheaply, for little money, especially for less than something is worth

You can still furnish a house for a song if you know where and how to look.

To Go For A Song