See? now I understand you, here's an easier way of doing it  
local LastUsedTime = 0 
local commands = 
    { 
        [ "!bitch" ] = { "You're son of a bitch !", "bitch.mp3" }, 
        [ "!suck" ] = { "You suck..", "suck.mp3" }, 
        [ "!2suck" ] = { "Hey ! You suck !", "suck(1).mp3" }, 
        [ "!babies" ] = { "All of you are babies !", "babies.mp3" }, 
        [ "!zag" ] = { "Zag Zag !", "zag.mp3" }, 
        [ "!laugh" ] = { "Muahahahahaha !", "laugh.mp3" }, 
        [ "!noobwins" ] = { "Noob wins..", "noobwins.mp3" }, 
        [ "!noob" ] = { "You're noob !", "noob.mp3" }, 
        [ "!surpise" ] = { "Surprise !", "surprise.mp3" }, 
        [ "!awful" ] = { "Ahahaha.. That's awful !", "awful.mp3" }, 
        [ "!goodmorning" ] = { "Good morning !", "goodmorning.mp3" }, 
        [ "!wth" ] = { "What the hell was that?!", "wth.mp3" } 
    } 
  
function scriptStart ( ) 
    outputChatBox ( "[sERVER] Sounds_Commands by Mefisto_PL activated ! Type !help for commands !", source, 255, 255, 255, true ) 
end 
addEventHandler ( "onPlayerJoin", getRootElement(), scriptStart ) 
  
function helpCommand ( message, type ) 
    if ( string.find ( message,"!help" ) ) and not ( string.find ( message," !help" ) ) then 
    outputChatBox ( "Sounds commands: !awful, !babies, !bitch, !laugh, !goodmorning, !noob, !noobwins, !suck, !2suck, !surprise, !wth, !zag", source ) 
end 
end 
addEventHandler ( "onPlayerChat", getRootElement(), helpCommand ) 
  
function soundCommands ( message, type ) 
    local source_name = getPlayerName ( source ):gsub ( "#%x%x%x%x%x%x", "" ) 
    local cmdData = commands [ message ] 
    if ( cmdData ) then 
        outputChatBox ( "*#FF9900" .. source_name .. "#FF4500: ".. cmdData [ 1 ], getRootElement(), 255, 255, 255, true ) 
        if ( getTickCount ( ) - LastUsedTime > 15000 ) then 
            triggerClientEvent ( "startSound", getRootElement(), "sounds/".. cmdData [ 2 ] ) 
        end 
        LastUsedTime = getTickCount ( ) 
    end 
    cancelEvent ( ) 
end 
addEventHandler ( "onPlayerChat", getRootElement(), soundCommands ) 
 
Now you can add as much commands as you want, with an easy way.