buồng tắm nhà vệ sinh 
bathroom like: nhà vệ sinh → →
Weißt du, wo die Toilette ist? ☊ 
Anh có biết nhà vệ sinh ở đâu không? ☊ (Lektion 2, Nr. 14) I have to go to the bathroom (= use the toilet). ☊ bathroom ☊
bodily functions (= for example eating, sex, using the toilet) ☊ function ☊
an outside toilet ☊ outside ☊
There are toilets at both front and rear of the plane. ☊ rear ☊
Have you flushed the toilet? ☊ toilet ☊
I need to go to the toilet (= use the toilet). ☊ toilet ☊
a toilet seat ☊ toilet ☊
Do you need the toilet? ☊ toilet ☊
Every flat has its own bathroom and toilet. ☊ toilet ☊
Who's in the toilet? ☊ toilet ☊
Could you tell me where the ladies' toilet is, please? ☊ toilet ☊