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You can't get abs with these exercises. Neither will these.
And you can't get abs with this one. All because here you are not building your abs, but the iliopsoas muscle, which is mostly responsible for hip flexion. And the abs in these exercises work maximally in static. The whole point is that the abs are responsible for a slightly different function of connecting their two attachment points and curling the spine. What exercises are then suitable to train the abs? If you are doing a crunches, do exactly the curling the spine, not the torso raise.
If you lift your legs, do a pelvic curl, not just a leg curl. This crossover exercise will be very good, by the way, to build your abs. Train properly.