Hello Keyshia! :)
The word "ونعم والله" is not very familiar in Egypt, but it is a very widely used in the Gulf Region. Our brothers from Saudi, UAE, Qatar, Kuwait, Bahrain and Oman they may use it in the following way:
If I would ask "what is your name?"
You would answer by saying "Keyshia"
I would answer back by saying "wal ne'em wallah or "ونعم والله"
This basically means "I am honoured to meet you or know you". But it literally means; The blessings of Allah to you.
Regarding your sentence that you have written in your comment:
أبا أتكل بالله ونعمٍ بالله .. .. اللي ما يوصد دون خلقه بابه
This means: I want to depend on Allah, and I trust or believe in Allah - أبا أتكل بالله ونعمٍ بالله
Here - wene'em bellah is different in this context, it means I believe in Allah.
The other part of the sentence, I am not really sure what it really means - but I guess this may mean that "nothing will bring tranquility upon his people but his door of mercy." - اللي ما يوصد دون خلقه بابه.
I am sorry about the last part, for am not really sure if the meaning is correct or not, but I believe it is a phrase that is widely used in the Gulf, and definitely a person from the Gulf will explain much better than I did.
Nevertheless, I hope at least you did understand the meaning of "ونعم والله" "ونعم بالله ".