Ca dao and proverbs are an extremely valuable literary treasure, a valuable asset to the Vietnamese people. Ca dao and proverbs are classified as one of the traditional literary values of the nation. The verses and proverbs often talk about human life, talk about nature, talk about people, talk about natural trees,…. Besides these factors, the proverbial singing also talks about the precious human qualities, the virtue that is clearly shown through many proverbial verses, especially gratitude, and remember the source of drinking water. NGHĨA LÀ GÌ