Elasticsearch additional boost if multiple conditions are met - elasticsearch

Question

Imagine I have a document, which looks like this:
{
"Title": "Smartphones in United Kingdom",
"Text": "A huge text about the topic",
"CategoryTags": [
{
"CategoryID": 1,
"CategoryName": "Smartphone"
},
{
"CategoryID": 2,
"CategoryName": "Apple"
},
{
"CategoryID": 3,
"CategoryName": "Samsung"
}
],
"GeographyTags": [
{
"GeographyID": 1,
"GeographyName": "Western Europe"
},
{
"GeographyID": 2,
"GeographyName": "United Kingdom"
}
]
}
CategoryTags and GeographyTags are stored as nested subdocuments.
I'd be looking for "apple united kingdom" in my search bar. How'd I make a query that would boost this document if it has both matching category and geography at the same time?
I was thinking of multi_match query, but I didn't figure out how would I deal with nested documents here...
I was thinking of nesting must into should statement. Would that make any sense?
POST /_search
{
"template": {
"size": "50",
"_source": {
"include": "Title"
},
"query": {
"filtered": {
"query": {
"bool": {
"minimum_number_should_match": "2<50%",
"must": [
{
"match": {
"Text": {
"query": "{{SearchPhrase}}"
}
}
}
],
"should": [
{
"match": {
"Title": {
"query": "{{SearchPhrase}}",
"type": "phrase",
"boost": "20"
}
}
},
{
"bool": {
"must": [
{
"nested": {
"path": "CategoryTags",
"query": {
"match": {
"CategoryTags.CategoryName": "{{SearchPhrase}}"
}
}
}
},
{
"nested": {
"path": "GeographyTags",
"query": {
"match": {
"GeographyTags.GeographyName": "{{SearchPhrase}}"
}
}
}
}
]
}
}
]
}
}
}
}
}
}