do any good

Improve a situation or effect a favorable result, as in Tell me if this new medicine does any good. [Early 1700s] A negative version, do no good, is slightly older (late 1600s); for example, All his explanations will do no good.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.