/ɪnˈdɔr ˈtreɪnɪŋ/ – Phrase
Definition: cải huấn trong trại.
A more thorough explanation: “Indoor training” refers to a type of training or educational program that takes place within a building or enclosed space, as opposed to outdoor training which takes place outside.
Example: The company provided in-door training sessions for all employees to improve their skills and knowledge.