You can ask Allah whatever you want – there isn’t anything in specific. Praise Allah and then offer salutation to the Prophet salla Allahu alaihi wa sallam and then ask Allah for whatever you want.

When asking Allah something that you want but you can’t afford, how should you ask it from Him? For example some certain laptop. You should say “Oh Allah give me this certain kind of laptop”, or “Oh Allah make me have this certain kind of laptop”? (A laptop is a minor thing we can ask from Allah but I took as an example to better know what I am asking.)