どんなふうに/どう/どうやって/どういうふうに etc.

When you want to ask "how" (the manner of a certain action), you can use an expression like どんなふうに、どう、どうやって、どういうふうに etc.

Consider, for instance, the following examples.

The differences among these expressions are quite subtle. But どんなふうに/どういうふうに concerns a task that involves more complicated process/manner while どう/どうやって concerns a tast that involves simpler one.