"rau lang" meaning in Vietnamese

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "rau",
        "3": "lang",
        "t1": "vegetables; greens"
      },
      "expansion": "rau (“vegetables; greens”) + lang",
      "name": "com"
    }
  ],
  "etymology_text": "rau (“vegetables; greens”) + lang.",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "rau lang",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "rau lang",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "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": "lifeform",
          "langcode": "vi",
          "name": "Vegetables",
          "orig": "vi:Vegetables",
          "parents": [
            "Foods",
            "Plants",
            "Eating",
            "Food and drink",
            "Lifeforms",
            "Human behaviour",
            "All topics",
            "Life",
            "Human",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "sweet potato leaves or greens"
      ],
      "id": "en-rau_lang-vi-noun-EsgQhltj",
      "links": [
        [
          "sweet potato",
          "sweet potato"
        ]
      ],
      "related": [
        {
          "english": "sweet potato",
          "word": "khoai lang"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[zaw˧˧ laːŋ˧˧]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[ʐaw˧˧ laːŋ˧˧]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[ɹa(ː)w˧˧ laːŋ˧˧]",
      "note": "Saigon"
    }
  ],
  "word": "rau lang"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "rau",
        "3": "lang",
        "t1": "vegetables; greens"
      },
      "expansion": "rau (“vegetables; greens”) + lang",
      "name": "com"
    }
  ],
  "etymology_text": "rau (“vegetables; greens”) + lang.",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "rau lang",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "rau lang",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "related": [
    {
      "english": "sweet potato",
      "word": "khoai lang"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Vietnamese compound terms",
        "Vietnamese entries with incorrect language header",
        "Vietnamese lemmas",
        "Vietnamese nouns",
        "Vietnamese terms with IPA pronunciation",
        "vi:Vegetables"
      ],
      "glosses": [
        "sweet potato leaves or greens"
      ],
      "links": [
        [
          "sweet potato",
          "sweet potato"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[zaw˧˧ laːŋ˧˧]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[ʐaw˧˧ laːŋ˧˧]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[ɹa(ː)w˧˧ laːŋ˧˧]",
      "note": "Saigon"
    }
  ],
  "word": "rau lang"
}