lẽ trời đất means "natural law" (phrase). natural law; what is right and proper.
How is lẽ trời đất pronounced?
You can listen to lẽ trời đất on this page in both Northern and Southern Vietnamese accents.
How is lẽ trời đất used in a sentence?
For example: Giúp người là lẽ trời đất. (Helping others is a matter of natural law.); Yêu thương cha mẹ là lẽ trời đất. (It is natural law to respect one's parents.).
Want "lẽ trời đất" to stick? Learn it with pictures, audio and spelling practice.