How to write storedprocedure for search?

Question

I have one tabe Name Product


        ApplicationId      uniqueidentifier
        ProductId           int
        ProductTypeId    int
        ProductCode       nvarchar(100)
        ProductName      nvarchar(max)
        ProductFor          nvarchar(max)
        summary             nvarchar(max)
        Price                  money
        TaggedPrice         money
         Keyword             nvarchar(max)
        Active                 Bit

        My requirement is i want to write single procedure for search based on productCode,ProductName,ProductFor.
I have written for one search based on Productname
create procedure search 
 @ApplicationId  Uniqueidentifier,
 @Search  nvarchar(max)
@Active    Bit
As
Begin
select @searchLike=CASE WHEN @Search <> '' THEN 'AND product.productName LIKE ''' +@Search+'%' '' ELSE '' END


EXEC ('SELECT ProductId,ProductName from Products where ApplicationId=''' @Application+''' AND Active=''' +@Active+''''+
@searchLike+' order by productid')
ENd

but i want to write for three Fields single proc.(Productname,ProductFor,ProductCode)


plz help me

Thanks inadvance