【do good】 —

1. be beneficial (usually with a quantifier):

• You could try taking a higher dose of Vitamin C; it might do some good.

2. help through charitable work:

• Sometimes I doubt if she will be as ready to begin doing good again.

Cf.: dogooder—(derog.) a well-meaning but unrealistic or ineffective philanthropist (who tries to “ 【do good】 ”):

• Amateur “do-gooders” could slip up when certain medical attention was needed.

Note: The expression does not correlate in meaning with the phrase do well—

1. (Progressive Tense) make a good recovery (from illness, etc.):

• She has completed her treatments and is doing well.

2. become professionally or financially successful:

• These are things I did and I did well as a nurse and a nurse’s aide.

3. (followed by Infinitive) be well-advised to act in a particular way:

• The corporation will do well to accept the union’s demands.

【make good】 —

1. = do well 2:

• Then she got a job in the hospital and made good as a nurse.

2. reimburse or refund smth.:

• If the article is defective, you should take it back and ask them to 【make good】 .