First, read the English article below.

Unless you're an avant-garde poet or you're starting a sentence with a brand name like "wikiHow" or "iPod," you will need to capitalize the first letter of every sentence. Here is an example of proper capitalization at the beginning of a sentence: She invited her friend over after school. In addition to starting sentences, capital letters should also occur at the start of proper nouns and titles. Proper nouns are the names of specific people, places, and things. Titles, which are a type of proper noun, are the names of works of art (books, movies, plays, etc.), institutions, geographical areas, and much more. Titles can also be honorifics (Her Majesty, Mr. President, etc.).  Titles and proper nouns consisting of more than one word should have every word capitalized, except for small words and articles like "the," "an," "and," etc. The first word of a title should always be capitalized (with the above "brand name" exception).  Here are a few examples of capital letters being used for proper nouns and titles: Genghis Khan quickly became the most powerful man in Asia, if not the world.  In her opinion, Queen Roberta's favorite museum in the world is the Smithsonian, which she visited during her trip to Washington, D.C., last year. An acronym is a word (or a "coined" word) formed from the first letter of every word in a long proper noun or title. Acronyms are frequently used to shorten long proper nouns that would be awkward to reprint in their entirety every time they are mentioned. Sometimes the letters of an acronym are separated by periods. Here is an example of acronyms made from capital letters: The CIA and the NSA are just two of the USA's many intelligence agencies. 

Now, please write a short abstract for it in Vietnamese. Abstract:
Luôn luôn viết hoa đầu câu. Viết hoa chữ cái đầu của tên riêng và tiêu đề. Viết hoa chữ cái viết tắt.