public async Task <IHttpActionResult> GetQuestionsByWord(string word)
        {
            try
            {
                QuestionBL bL      = new QuestionBL(_context);
                var        results = await bL.GetQuestionsByVoca_Word(word);

                if (results.Count() == 0)
                {
                    return(NotFound());
                }
                return(Ok(results));
            }
            catch (Exception)
            {
                return(InternalServerError());
            }
        }