Ask HN: Please help me find out the major flaw in my last project

I've done several websites in my lifetime but this one is proving to be the hardest yet.

It's not a problem to change or work to add something new, I've redesigned the website several times now. I've never done a website for apartment rentals before, but I didn't expect it to be this hard. It didn't convert any adwords potential user until now (i.e. visitors don't book any apartments), and I need to find out why. I believe there is a major flaw in it but I don't seem to figure out. The website is:

www.aparthomes.ro

I would be very grateful for any type of feedback. Thank you, dear HN.