Search with the combination of 2 fields in elasticsearch

Question

i have a search phrase it contains text belongs to both song and category fields or either one

eg:- song name reverb

both search phrases can have more than 1 word and there is no differentiating factor in the search phrase to tell which belongs to which field

How do i handle this use-case in DSL query

currently using this query for 1 field match

"wildcard": {
   "song.keyword": {
       "value": "*song name*"
   }
}