Abbreviation

bài tóm tắt

(abridged version of a document)

sự rút gọn

(mathematics: reduction to lower terms)

sự rút ngắn

(act or result of shortening or reducing)

sự tóm tắt

(act or result of shortening or reducing)

sự ước lược

(mathematics: reduction to lower terms)

viết tắt

(shortened or contracted form of a word or phrase)