Hi, Sachin!
The VLookUp function doesn't retrieve a zero value (I assume from your post that you're searching for the division name), unless you've embedded it on a IF or other encapsulating formula. It just return the value searched (exact or aproximated, depending on last parameter false or true, respectively) or the #N/A text.
Despite of that, if you search for the unquoted value "All", it won't retrieve all your divisions (let's say three), it actually performs a search for a division named All.
Regards!