أستاذ محمد مرتضى,
First, I'm going to tell you about the difference between the two verbs (rob and steal) ... Actually most of the students make this mistake because the verbs have somehow similar meanings. However, we can distinguish between them.
In modern usage, both words refer to taking something from a place or person without permission. The important thing to remember is that you can steal something from someone but you can’t steal someone! A person can be robbed (ie: have their property taken from them) but not stolen (taken away by the thief).
to steal something from somebody: e.g. my watch was stolen, he stole my watch, they stole my laptop from me.
to rob somebody/a bank/a shop/ a house etc: e.g. a man robbed me (of my watch), the bank was robbed yesterday, my local Tesco was robbed at the weekend.
A robber tends to use violence or the threat of violence in order to steal, whereas a thief doesn't use force or violence
You rob a place or person (of objects).
You steal objects (from a place or person).
Other examples:
I am sure that my flatmate is stolen from me!
My house was robbed at the weekend!
I hope that it's clear now
... I'll be back 
