NX1000 produces too many blurry photos?

Thanks for your answers.

I did some more experiments with the camera at home in last days.My impression is:

Under a bit low light coniditions(for example:my room), if I don't use the flash, many photos taken are blurry.If I use flash, most of the photos are not blurry.I used Smart mode mostly. Also sometimes tried using Manual mode using some different settings of ISO and shutter speed but photos were mostly blurry in my room(a bit low light) without using flash.Maybe there is a magic setting/combination of settings which may cause taking clear pictures(without flash) in my room but I haven't found it yet.

I wrote in a previous post that I sometimes use timer(self-timer) mode and take my own portrait and many of them are blurry(even if I use flash).A few days ago I read an article about that and it explains,when using self-timer mode, when we press the shutter to start timer,at that time it chooses the focus and cause when we are not in the position in front of the camera while pressing, when we take our place in front of the camera after a few seconds, it doesn't focus on us properly because the camera has already chosen it's focus when we first pressed the shutter to start timer.If there are some people in front of the camera while we are pressing the shutter, then when we take our place in the group there is less focus problem if there is any.

There are some advices for taking your own portraits using self-timer, like using manual focus and like putting a chair in front of the camera and make the camera focus on the chair while we are pressing the shutter, and then remove the chair from it's position and put yourself at the chair's previous position which was focussed by the camera.I find it a bit difficult but I will try them in the next days.