/**
  * @param Product $product
  * @param AdContents $ad_contents
  */
 private function createAdGroupWithSearchWord(Product $product, AdContents $ad_contents)
 {
     $group_name = CsvContentsUtil::clipText($product->getName() . '×' . '検索ワード', 50);
     $group = new AdGroup($group_name, $ad_contents);
     $search_word = $product->getSearchWord();
     $keywords = preg_split('/[\\s 、,]+/u', $search_word, -1, PREG_SPLIT_NO_EMPTY);
     foreach ($keywords as $word) {
         $group->addKeyword($product->getName() . ' ' . $word);
     }
     if (!empty($group->getKeywords())) {
         array_push($this->ad_groups, $group);
     }
 }