How to get 3-4 cell data in 1 cell ?

Hi frends, How are you ? i need your help pls

It is really hard to give a subject name when you don't know how to explain (not even to your self).

How to get 3-4 cell data in 1 cell ?
for example

A1 It is really hard to give a subject
A2 name when you don't know how to explain
A3 (not even to your self).

i want A1, A2 and A3 data in one cell, either in A1 or any other cell
that should be like
A1 = It is really hard to give a subject name when you don't know how to explain (not even to your self).
Thanx

I would use concatenate for this but the result would not be able to be posted into any of cells A1, A2 or A3.

On your example this would be:

=concatenate(A1," ",A2," ",A3)