Flt + highlight, no highlight

Hi all,
I have a little problem with highlight mechanism, there are already some
posts on fuzzy + highlight but I don't find any solution to my problem.
I use ES as part of keywords search engine development for a travel agency
website.
Basic requests use match + highlight and all works very good.
But, when match does not find any result, I try to use flt to see there
will be not similar results (i.e. a proper name miswritten, ...)

So, here an example of match request which works with highlight :

{
"query": {
"match": {
"_all": {
"query": "N'Gorongoro",
"operator": "and"
}
}
},
"highlight": {
"order": "score",
"fields": {
"_all": {},
"title": {
"number_of_fragments": 0
},
"themes": {
"number_of_fragments": 0
},
"intro": {
"number_of_fragments": 2,
"fragment_size": 75,
"fragment_offset": 25
},
"summary": {
"number_of_fragments": 2,
"fragment_size": 75,
"fragment_offset": 25
},
"program": {
"number_of_fragments": 3,
"fragment_size": 75,
"fragment_offset": 25
},
"hotel": {
"number_of_fragments": 2,
"fragment_size": 75,
"fragment_offset": 25
},
"accommodations": {
"number_of_fragments": 3,
"fragment_size": 75,
"fragment_offset": 25
},
"vehicles": {
"number_of_fragments": 2,
"fragment_size": 75,
"fragment_offset": 25
},
"options": {
"number_of_fragments": 2,
"fragment_size": 75,
"fragment_offset": 25
},
"extensions": {
"number_of_fragments": 2,
"fragment_size": 75,
"fragment_offset": 25
},
"content": {
"number_of_fragments": 3,
"fragment_size": 100,
"fragment_offset": 50
}
}
}
}

And there, an example of flt request which works but where there is not
highlight :

{
"query": {
"flt": {
"like_text": "gorogoro"
}
},
"highlight": {
"order": "score",
"fields": {
"_all": {},
"title": {
"number_of_fragments": 0
},
"themes": {
"number_of_fragments": 0
},
"intro": {
"number_of_fragments": 2,
"fragment_size": 50
},
"summary": {
"number_of_fragments": 2,
"fragment_size": 50
},
"program": {
"number_of_fragments": 3,
"fragment_size": 50
},
"hotel": {
"number_of_fragments": 2,
"fragment_size": 50
},
"accommodations": {
"number_of_fragments": 3,
"fragment_size": 50
},
"vehicles": {
"number_of_fragments": 2,
"fragment_size": 50
},
"options": {
"number_of_fragments": 2,
"fragment_size": 50
},
"extensions": {
"number_of_fragments": 2,
"fragment_size": 50
},
"content": {
"number_of_fragments": 3,
"fragment_size": 100
}
}
}
}

Does someone have any suggestion ?
Thank you.

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