laravel の曖昧検索について

このような検索画面の曖昧検索をしたいのですが、
以下のコードを実行すると、全てのデータが帰ってきてしまいます。
UserControllerの曖昧検索のSQL文のところを変えてみたりしたのですがうまくいきません。
他に何か原因は考えられるでしょうか？
ご教授お願いいたします。

UsersController

php
1<?php
2
3namespace App\Http\Controllers;
4
5use Illuminate\Http\Request;
6
7class UsersController extends Controller
8{
9    //
10    public function profile(){
11        return view('users.profile');
12    }
13    public function search(Request $request){
14        
15        $list = \DB::table('users')->get();
16        return view('users.search',['list'=> $list]);
17
18        $keyword = $request->input('keyword');
19    }
20
21    public function result(Request $request){
22        $keyword = $request->input('keyword');
23        $list = \DB::table('users')
24            ->where('username','LIKE',"%{$keyword}%")->get();
25            
26            
27            return view('users.search',['list'=> $list]);
28    }
29    
30    }

web.php(ルート）

php
1<?php
2
3/*
4|--------------------------------------------------------------------------
5| Web Routes
6|--------------------------------------------------------------------------
7|
8| Here is where you can register web routes for your application. These
9| routes are loaded by the RouteServiceProvider within a group which
10| contains the "web" middleware group. Now create something great!
11|
12*/
13
14// Route::get('/', function () {
15//     return view('welcome');
16// });
17// Route::get('/home', 'HomeController@index')->name('home');
18
19//Auth::routes();
20
21
22//ログアウト中のページ
23Route::get('/login', 'Auth\LoginController@login');
24Route::post('/login', 'Auth\LoginController@login');
25
26Route::get('/logout', 'Auth\LoginController@logout');
27Route::get('/logout', 'Auth\LoginController@logout');
28
29Route::get('/register', 'Auth\RegisterController@register');
30Route::post('/register', 'Auth\RegisterController@register');
31
32Route::get('/added', 'Auth\RegisterController@added');
33
34
35//ログイン中のページ
36Route::get('/top','PostsController@index');
37// Route::post('/top','PostsController@index');
38Route::post('/post','PostsController@create');
39Route::get('/profile','UsersController@profile');
40
41Route::post('/result','UsersController@result');
42
43
44Route::get('/search','UsersController@search');
45
46
47Route::get('/follow-list','PostsController@index');
48Route::get('/follower-list','PostsController@index');
49
50
51
52
53

search.blade.php

php
1@extends('layouts.login')
2
3@section('content')
4{{Form::open(['url'=>'/result'])}}
5{{Form::text('search-form',null,['class' => 'input'])}}
6{{Form::submit('送信',['class' => 'search-button'])}}
7{{Form::close()}}
8
9<div class='container'>
10  <table class='table table-user'>
11
12@foreach ($list as $list)
13   <tr>          
14                <td><img src="{{ asset('images/dawn.png')}}"alt = "dawn.png"><td>
15                <td>{{ $list->username }}</td>
16                <td>{{Form::submit('フォローをする',['class'=>'remove-follow']) }}
17                
18            </tr>
19            @endforeach
20
21
22
23@endsection