Hi Nikita, if you turn off the "Display hidden lines" checkbox on the View palette on the side pane then the dotted "hidden lines" will not be displayed and will not be targeted for individual click selection but window select will grab everything contained in it not just the ones on the front.

If you can post your file I can try to show you some suggestions, often times changing your 3D view angle can help to target some specific things or otherwise like I wrote before if stuff is getting in your way you need to hide or lock things so you don't have your screen full of stuff you don't want to target.

- Michael