The Vietnamese word "thỉnh nguyện" is a verb that means "to express one's wishes or requests." It is often used in formal contexts, especially when someone is trying to ask for something or petition for a specific cause or need.
In more formal or governmental contexts, "thỉnh nguyện" can be used in petitions or requests to authorities or organizations. For instance, when citizens organize to request changes in policies, they might submit a "đơn thỉnh nguyện" (a petition).
While "thỉnh nguyện" primarily means to express wishes or requests, it can also imply a formal appeal, especially in legal or administrative contexts.