It might be possible to help you.
I want to help you as much as possible.
I wish I could help you.
I would help you if I could―if I had the power.
I want to be of help to you.
There is something that I would like you to help with.
I wish that I could help you, but...
I will do my best so that I can help you as much as possible.
I may be able to support you.
Please tell me if there is something that I can help you with.