Alexa parses the data from your voice request and sends us a text request. But if you have too many ideas packed into a single sentence, it might confuse the machines. That means you won't get a good response.
Try using less complex sentences and ideas. If you asked Alexa tell me what the latest top stories for Amazon and Google from the last twenty minutes are and also tell me a few of the most read stories on the president, you probably won't get an accurate response. One of the best ways to get around this issue is to build a watchlist for your particular interests on our desktop or mobile platform then reference that watchlist.