**Reference **
API : https://www.elastic.co/guide/en/elasticsearch/reference/current/index.htmlSearch API : https://www.elastic.co/guide/en/elasticsearch/reference/current/search-uri-request.htmlQuick : http://www.elasticsearchtutorial.com/elasticsearch-in-5-minutes.htmlDOC : https://github.com/elastic/elasticsearchChị Ngọc : https://nguyenthingocblog.wordpress.com/2014/08/22/elasticsearch-introduction/
1. Elasticsearch, so what's...