So, I wonder where can I buy that laptop in Spain. In which shop? I've searched and most of them only have some lenovo laptops such as "LENOVO G500S", but I don't want that... (only 500GB HDD, though 16GB RAM).
Based on Lenovo's website for Spain the Y410p is not sold in your country, only the Y510p is. You are unlikely to find it in any store in Spain because of that.
If you want the Y410p, then you only have the following options:
1. Ask a store if they can import one for you. This will be expensive though. Not only will you need to pay import taxes on it, the store will also likely charge you an extra fee for going through the trouble of importing it for you.
2. If you have friends / family who lives an a country where the Y410p can be ordered (like the US), then they can ship it to you.
It seems the Y410p is simply not sold in Europe yet. I have checked Lenovo's regional websites for countries like the UK, France, Germany and Italy. None of them had the Y410p listed at all.