   search: (callback) ->
     headers = {}
     headers["API Token"] = @api_key
-    query_string = "hashid=#{@hashid}"
+    
+    query_string = @make_querystring()
     
     # Preparing request variables
     options = 

    req.end()

  ###
  add_filter

  This method adds a filter to query

    # Callback function will be passed as argument to search
    # and will be returned with response body
    process_response = (res) ->
      if res.statusCode >= 400
        return callback res.statusCode, null
      
      else 
        res.on 'data', (chunk) ->
          res_json = JSON.parse(chunk)
          return callback null, res_json

        res.on 'error', (err) ->
