Matching author and title with elasticsearch -

i'm trying match books based on author , title. unfortunately titles , authors used input differ in elasticsearch, words in different orders , have other differences can't exact matching. book records have field author , title. i've come following query:

{   "query":{     "bool":{       "must":{         "query_string":{           "query":"not israel parents promised me"         },         "fuzzy":{           "author":{             "value":"peka, harvey",             "boost":2           }         }       }     }   },   "from":1,   "size":1 } 

it's giving same result every time no matter input seems there's problem it. going wrong way?

i indexed books , authors , tried out. worked me different combinatios, like, jumbled words , incomplete names , when words incorrect, shown below:

{   "query": {     "bool": {       "must": [         {           "query_string": {             "default_field": "book",             "query": "the girl angel tattoo"           }         },         {           "query_string": {             "default_field": "author",             "query": "steig larsson"           }         }       ]     }   } }