What more can I do?
What more can (one) do?
There is nothing else that one is able to do to improve or resolve this unfortunate situation. I've already apologized and offered to pay for the damage—what more can I do? A: "I just feel like the company should be doing more to fix this mess." B: "But what more can they do? They've followed all the legal channels that are open to them."
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
What more can I do?and What else can I do?
I am at a loss to know what else to do. Is there anything else I can do? (An expression of desperation, not an inquiry.) Bob: Did you hear about the death in the Wilson family. Bill: Yes, I feel so helpless. I sent flowers. What more can I do? Bill: Is your child still sick? Mary: Yes. I'm giving her the right medicine. What more can I do?
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.