POST _search
"query": {
    "more_like_this" : {
        "fields" : ["tags"],
        "like" : ["t1", "t2"],
        "min_term_freq" : 1,
        "min_doc_freq": 1
    }
}

Document1 ("t1 t2") with score 0.8838835
Document2 ("t1") with score 0.30685282
Document3 ("t1 t3") with score 0.19178301

Document2 ("t1")
Document3 ("t1 t3")
Document1 ("t1 t2")

@Query("{" +
        "  query: {" +
        "    more_like_this : {" +
        "      fields : ["tags"]," +
        "      like : ["t1", "t2"]," +
        "      min_term_freq : 1," +
        "      min_doc_freq: 1" +
        "    }" +
        "  }" +
        "}")
List<Taggeable> customMethod(String tags);