Are there any duas that will make my particular problem go away?

_(This is question is intentionally left vague as it is meant to provide canonical answers to a wide class of questions.)_ --- I have a very particular problem that has been bothering me. Even if I prayed for it to be removed from my life in the past, it hasn't gone away. I may have been dealing with it for such a long time that I just can't handle it anymore. Nothing I do can make it better, but Allah has power over all things. Are there any particular duas that will solve this for me? When I search, all the duas I see are for things like protection from evil, asking for mercy, or for rewards in the hereafter, which are all good, but are there any duas that can give me actual practical results in *this* world?