Twitter API not getting all tweets for Particular tag


I have created app for get all tweets for hastag.but it is getting only 15 tweets but in twitter search it is showing more than 15 tweets

My twitter API Call
Search Link.


The Search API is optimised for recency and only provides access to around 1 week of history. Not all Tweets are available in the public search API index. This is per the documentation - check the opening paragraphs and the Best Practices section on that page. Your results may differ from the search available via the Twitter website and mobile apps.