If I understand what you're asking, you need more vertices. The plane is getting twisted up. It looks like you have something this:
You need to move those vertices back to where they should be:
Then subdivide the horizontal lines:
that will give you more horizontal vertices to follow the line of the hood:
To get the shape of the headlight area you'll likely need a lot more:
It is good to try to keep the number of vertices as low as possible, and let the subdivision modifier do the work, but you need at least something to work with. Hope this helps!