Она, должно быть, не поняла по како

Она, должно быть, не поняла по какой дороге ей идти, и,возможно, она заблудилась.

Results (English) 1:

She must have realized for some way to go, and possibly she wandered about.

Results (English) 2:

She must have not understood which way it go, and maybe she was lost.

Results (English) 3:

It should be, not understood that on which road to take, and,perhaps, it got lost.