More movies similar to this one?

^So many supernatural films used as suggestions (The Others, Devil's Backbone, etc)...This film wasn't that much of a supernatural horror to begin with.

If you want a story where the main character is searching for a missing person (a loved one especially, like their child) then look no further than Flightplan, The Forgotten and Clint Eastwood's Changeling.

Clint Eastwood's one had a pretty much similar intensity where I was sitting down gritting my teeth in anxiety and distress.

Life is like a beautiful melody, only the lyrics are messed up.

There are many movies similar to this. Some that come straight to me: Pan's Labyrinth, Mama and Hansel and Gretel (Korean).

'The Others' was very close, in fact this movie is near to be called a sequel to it.

You better know what you want to do before somebody knows it for you -The Astronaut Farmer

The Awekening, (2011)

OP I recommend the 'Babadook' and ' Before I Wake' - movies that are about mothers dealing with grief. They're absolutely amazing.

"One must not wish first to understand and then to feel. Art does not tolerate Reason." - A. Camus

The poster who said this movie is similar in style to “The Others” hit the nail on the head. Great flick.