Query from multiple fields with boolean operators

[namali (mali)]

wanted to query two fields (a and b) in 'and' /'or' operators to check ((a > 90 and b >=70 ) or (a>80 and b>98))with another field. Please guide me to write combine multiple query clauses using boolean operators
"""
updaterideid = {
"script": {
"inline": "ctx._source.rid=params.paramsstrid",
"lang": "painless",
"params": {
"paramsstrid": strrid
}
},
"query": {
"bool": {
"must": [
{
"match": {
"_id": strhbid
}
},
{
"match": {
"a":{"lt" : a}
}
},
{
"match": {
"b":{"lt" : b}
}
}
]
}
}
"""

[Vinayak_Sapre]

{
  "query": {
    "bool": {
      "filter": {
        "bool": {
          "should": [
            {
              "bool": {
                "must": [
                  {
                    "range": {
                      "a": {
                        "gt": 90
                      }
                    }
                  },
                  {
                    "range": {
                      "b": {
                        "gte": 70
                      }
                    }
                  }
                ]
              }
            },
            {
              "bool": {
                "must": [
                  {
                    "range": {
                      "a": {
                        "gt": 80
                      }
                    }
                  },
                  {
                    "range": {
                      "b": {
                        "gt": 98
                      }
                    }
                  }
                ]
              }
            }
          ]
        }
      }
    }
  }
}

[namali (mali)]

Thank you very much Vinayak_Sapre for your explanation with the coding