diff --git a/app/controllers/contests_controller.rb b/app/controllers/contests_controller.rb
index adadfbf44..1b172e0cc 100644
--- a/app/controllers/contests_controller.rb
+++ b/app/controllers/contests_controller.rb
@@ -26,7 +26,7 @@ class ContestsController < ApplicationController
     # @contests = Contest.visible
     # @contests ||= []
     @offset, @limit = api_offset_and_limit({:limit => 10})
-    @contests = Contest.visible    
+    @contests = Contest.visible
     @contests = @contests.like(params[:name]) if params[:name].present?
     @contest_count = @contests.count
     @contest_pages = Paginator.new @contest_count, @limit, params['page']
diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index b46ab52b1..157de5ce7 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -99,7 +99,8 @@ class CoursesController < ApplicationController
   # add by nwb
   def search
     courses_all = Course.all_course
-
+    name = params[:name]
+    (redirect_to courses_path, :notice => l(:label_sumbit_empty);return) if name.blank?
     @courses = courses_all.visible
     if params[:name].present?
       @courses_all = @courses.like(params[:name])
diff --git a/app/controllers/forums_controller.rb b/app/controllers/forums_controller.rb
index b54d98b8f..f3ebfad88 100644
--- a/app/controllers/forums_controller.rb
+++ b/app/controllers/forums_controller.rb
@@ -166,6 +166,8 @@ class ForumsController < ApplicationController
 
   def search_forum
     # @forums = paginateHelper Forum.where("name LIKE '%#{params[:name]}%'")
+    name = params[:name]
+    (redirect_to forums_path, :notice => l(:label_sumbit_empty);return) if name.blank?
     @offset, @limit = api_offset_and_limit({:limit => 10})
     @forums_all = Forum.where("name LIKE '%#{params[:name]}%'")
     @forums_count = @forums_all.count
diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 144e86f4f..1c2db7f79 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -373,7 +373,7 @@ class UsersController < ApplicationController
   def search
     sort_init 'login', 'asc'
     sort_update %w(login firstname lastname mail admin created_on last_login_on)
-
+    (redirect_to users_path, :notice => l(:label_sumbit_empty);return) if params[:name].blank?
     case params[:format]
     when 'xml', 'json'
       @offset, @limit = api_offset_and_limit({:limit => 15})
diff --git a/app/controllers/welcome_controller.rb b/app/controllers/welcome_controller.rb
index 9c72d301f..3e708b94a 100644
--- a/app/controllers/welcome_controller.rb
+++ b/app/controllers/welcome_controller.rb
@@ -88,7 +88,8 @@ class WelcomeController < ApplicationController
         when :users_student
           redirect_to users_search_path(:name => search_condition, :role => :student)
         else
-          redirect_to home_path, :alert => l(:label_sumbit_empty)
+          #redirect_to home_path, :alert => l(:label_sumbit_empty)
+        (redirect_to home_path, :notice => l(:label_sumbit_empty);return) #if params[:name].blank?
         end
       }
     end
diff --git a/app/models/forum.rb b/app/models/forum.rb
index e6b16df39..cd9c210dd 100644
--- a/app/models/forum.rb
+++ b/app/models/forum.rb
@@ -9,7 +9,7 @@ class Forum < ActiveRecord::Base
   'memo_count',
   'last_memo_id',
   'creator_id'
-  validates_presence_of :name, :creator_id
+  validates_presence_of :name, :creator_id, :description
   validates_length_of :name, maximum: 50
   validates_length_of :description, maximum: 255
   validates :name, :uniqueness => true
diff --git a/app/views/forums/show.html.erb b/app/views/forums/show.html.erb
index 72e7ce221..34fc953da 100644
--- a/app/views/forums/show.html.erb
+++ b/app/views/forums/show.html.erb
@@ -3,17 +3,17 @@
 	<h3><%=l(:label_memo_new)%></h3>
 	<% if User.current.logged? %>
 	<%= labelled_form_for(@memo, :url => create_memo_forum_path(@forum), :html => {:multipart => true} ) do |f|  %>
-	<% if @memo.errors.any? %>
+	<!--<#% if @memo.errors.any? %>
 		<div id="error_explanation">
-			<h2><%= pluralize(@memo.errors.count, "error") %> prohibited this memo from being saved:</h2>
+			<h2><#%= pluralize(@memo.errors.count, "error") %> prohibited this memo from being saved:</h2>
 
 			<ul>
-				<% @memo.errors.full_messages.each do |msg| %>
-				<li><%= msg %></li>
-				<% end %>
+				<#% @memo.errors.full_messages.each do |msg| %>
+				<li><#%= msg %></li>
+				<#% end %>
 			</ul>
 		</div>
-	<% end %>
+	<#% end %>  -->
 	<div class="actions" style="max-width:680px">
 		<p><%= f.text_field :subject, :required => true%></p>
 		<p style="max-width:680px"><%= f.text_area :content, :required => true, :id => 'editor02' %></p>