MySQL Multiple Conditions

I am trying to search my database, I initially had it working with only one and condition but now with four, it will just refresh the page, removing field inputs.

I have tried using only a comma's but this appears to also not work. I have been unable to find any information on Google about their being a limit but also no examples using four conditions. Is there a correct or better way I could try?

if(isset($_POST['search'])){
   $lname = trim($_POST['lname']);
   $address = trim($_POST['address']);
   $street = trim($_POST['street']);
   $city = trim($_POST['city']);
   $county = trim($_POST['county']);

   if($lname==""){
      $error[] = "Provide Last Name."; 
   }elseif($address=""){
       $error[] = "Provide House Number/Name.";
   }elseif($street==""){
      $error[] = "Provide Street.";
   }elseif($city==""){
       $error[] = "Provide City.";
   }elseif($county==""){
       $error[] = "Provide County.";
   }else{
       try{
           $stmt = $conn->prepare("SELECT * FROM clients WHERE lname=lname AND address=address AND street=street AND city=city AND county=county");
           $stmt->execute(array("lname"=>$lname, "address"=>$address, "street"=>$street, "city"=>$city, "county"=>$county));
           $userRow=$stmt->fetch(PDO::FETCH_ASSOC);

           if($userRow==''){
               $user->redirect('./results.php?new='.$lname.$street);
           }else{
               if($userRow['rating'] == 'good'){
                   $user->redirect('./results.php?good='.$lname.$street);
               }
               if($userRow['rating'] == 'cautionextra'){
                   $user->redirect('./results.php?cautionextra='.$lname.$street);
               }
                if($userRow['rating'] == 'cautiondiscount'){
                   $user->redirect('./results.php?cautiondiscount='.$lname.$street);
               }
               if($userRow['rating'] == 'cautionlate'){
                   $user->redirect('./results.php?cautionlate='.$lname.$street);
               }
               if($userRow['rating'] == 'badnopay'){
                   $user->redirect('./results.php?badnopay='.$lname.$street);
               }
               if($userRow['rating'] == 'badabusive'){
                   $user->redirect('./results.php?badabusive='.$lname.$street);
               }
           }
        }
        catch(PDOException $e){
             echo $e->getMessage();
        }
    } 
}

Executing SELECT * FROM clients WHERE lname=lname AND address=address AND street=street AND city=city AND county=countyin phpmyadmin returns all of the rows, great but when I var_dump($userRow);, it shows the results for a row different to the one of which I tried to search for.