[{"url":"a","nested_object_keys":[{"vendor":"terraform","tag":"some_tag"},{"vendor":"terraform","tag":"some_other_tag"}]},{"url":"c","nested_object_keys":[{"vendor":"terraform","tag":"some_tag"}]},{"url":"b","nested_object_keys":[{"vendor":"terraform","tag":"some_tag"},{"vendor":"terraform","tag":"some_other_tag"}]}]

db.collection.find({"nested_object_keys.tag":{$all:["some_tag","some_other_tag",]}})