Transact SQL :: Get Result On Two Table Join With Multiple Parameter?

I have a criteria where i want to join table 1 with table 2 , table 1 consists of products which were given to salesman to sell and table 2 has the sales data which salesman has sold out. Now i want to know left over products of each sales with join .Below is my data, here is what i am trying to do, but it return only salesman 1 data.

CREATE TABLE Salesman_Product
(
SalesManID int,
ProductID int
)
INSERT INTO Salesman_Product (SalesManID,ProductID) Values (1,1),(1,2),(1,3),(1,4)  
INSERT INTO Salesman_Product (SalesManID,ProductID) Values (2,1),(2,2),(2,3),(2,4) 

[code]....