what's the difference between a saying, a set phrase, an idiom and a collocation?
I'd like to know the difference between a saying, a set phrase, an idiom and a collocation. I'd be grateful if you could give me some examples.

Question

Answer

Saying: a well-known and wise statement made by famous people, which often has a meaning that is different from the simple meanings of the words it contains

Idiom: group of words in a fixed order forming an expression whose meaning is not predictable from the usual meanings of its constituent elements/words

set phrase : 
A common expression whose wording is not subject to variation.

collation ( collect ) it means  study and compare (texts, evidence

Đừng bỏ lỡ cơ hội học ngoại ngữ ngay tại nhà. Hãy xem danh sách các gia sư ngôn ngữ giàu kinh nghiệm của chúng tôi và đăng ký buổi học đầu tiên ngay hôm nay!