/ˈɪnlənd ˈwɔtərz/ – Phrase
Definition: mặt nước nội địa.
A more thorough explanation: Inland (internal) waters refer to bodies of water, such as lakes and rivers, that are entirely surrounded by the land territory of a single state. These waters are considered to be under the full sovereignty of that state and are not subject to the right of innocent passage by foreign vessels.
Example: The country’s laws govern the use and protection of inland (internal) waters within its territory.