"lạc đề" meaning in Vietnamese

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "lạc",
        "3": "đề",
        "t1": "to be lost",
        "t2": "the subject or topic of a schoolwork problem"
      },
      "expansion": "lạc (“to be lost”) + đề (“the subject or topic of a schoolwork problem”)",
      "name": "com"
    }
  ],
  "etymology_text": "lạc (“to be lost”) + đề (“the subject or topic of a schoolwork problem”).",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "verb",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "lạc đề",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "lạc đề",
      "name": "vi-verb"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Vietnamese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "vi",
          "name": "Education",
          "orig": "vi:Education",
          "parents": [
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "This essay was criticized as off-topic because it was about other matters.",
          "text": "Bài luận này bị phê là lạc đề vì viết về chuyện khác.",
          "type": "example"
        },
        {
          "english": "Make sure you fully understand the question and keep in mind the keywords to stay on-topic.",
          "text": "Làm bài thì phải hiểu rõ câu hỏi và ghi nhớ từ khoá để khỏi lạc đề.",
          "type": "example"
        }
      ],
      "glosses": [
        "to fail to address the topic of the question at hand"
      ],
      "id": "en-lạc_đề-vi-verb-e8uWvi4b",
      "links": [
        [
          "education",
          "education"
        ],
        [
          "address",
          "address"
        ],
        [
          "topic",
          "topic"
        ],
        [
          "question",
          "question"
        ]
      ],
      "raw_glosses": [
        "(chiefly education) to fail to address the topic of the question at hand"
      ],
      "topics": [
        "education"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[laːk̚˧˨ʔ ʔɗe˨˩]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[laːk̚˨˩ʔ ʔɗej˦˩]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[laːk̚˨˩˨ ʔɗej˨˩]",
      "note": "Saigon"
    }
  ],
  "word": "lạc đề"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "lạc",
        "3": "đề",
        "t1": "to be lost",
        "t2": "the subject or topic of a schoolwork problem"
      },
      "expansion": "lạc (“to be lost”) + đề (“the subject or topic of a schoolwork problem”)",
      "name": "com"
    }
  ],
  "etymology_text": "lạc (“to be lost”) + đề (“the subject or topic of a schoolwork problem”).",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "verb",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "lạc đề",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "lạc đề",
      "name": "vi-verb"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Vietnamese compound terms",
        "Vietnamese entries with incorrect language header",
        "Vietnamese lemmas",
        "Vietnamese terms with IPA pronunciation",
        "Vietnamese terms with usage examples",
        "Vietnamese verbs",
        "vi:Education"
      ],
      "examples": [
        {
          "english": "This essay was criticized as off-topic because it was about other matters.",
          "text": "Bài luận này bị phê là lạc đề vì viết về chuyện khác.",
          "type": "example"
        },
        {
          "english": "Make sure you fully understand the question and keep in mind the keywords to stay on-topic.",
          "text": "Làm bài thì phải hiểu rõ câu hỏi và ghi nhớ từ khoá để khỏi lạc đề.",
          "type": "example"
        }
      ],
      "glosses": [
        "to fail to address the topic of the question at hand"
      ],
      "links": [
        [
          "education",
          "education"
        ],
        [
          "address",
          "address"
        ],
        [
          "topic",
          "topic"
        ],
        [
          "question",
          "question"
        ]
      ],
      "raw_glosses": [
        "(chiefly education) to fail to address the topic of the question at hand"
      ],
      "topics": [
        "education"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[laːk̚˧˨ʔ ʔɗe˨˩]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[laːk̚˨˩ʔ ʔɗej˦˩]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[laːk̚˨˩˨ ʔɗej˨˩]",
      "note": "Saigon"
    }
  ],
  "word": "lạc đề"
}