First, read the English article below.

Make copies of the important documents. Do not submit the original document. While the exact requirements may vary from country to country, in general, you will need:  A copy of your birth certificate A copy of your current passport Proof of residency, such as job records, bank statements, travel records, or official mail with your address on it. Proof of employment, such as a signed statement from your employer. If you're retired or self-employed, show financial records to demonstrate that you are financially stable. If you are married to a citizen of the country, you will need proof of the marriage, such as a marriage certificate, birth certificates of any children, and family photos. This application is typically available on the website of the country's department of immigration. Read through the application carefully before filling it out. While the application is different in every country, you may need to state:  Your full name Current and previous addresses Date of birth Current citizenship Education How long you have been a resident in the country Details about your family, including your parents, spouse, and children. You may have to pay for the application to be processed. These fees can wary widely. Some examples of application fees include:  Ireland: €175 Germany: €255 Sweden: 1,500 SEK Spain: €60-100 A citizenship test shows that you are knowledgeable about the country's customs, language, laws, history, and culture. These tests are short, but they are required in many EU countries.  For example, in Germany, you will be asked 33 questions about German history, law, and culture. You must answer at least 17 correctly.  This test will usually be given in the country's official language. In some countries, you must be interviewed by a judge or the police before you can receive citizenship. After you fill out your application, you will receive notification of the date and place of your hearing. Most countries have a ceremony for new citizens. At this ceremony, citizens sworn in. You may receive a... 

Now, please write a short abstract for it in Vietnamese. Abstract:
Thu thập tài liệu. Điền đơn. Nộp phí hồ sơ. Làm bài kiểm tra quốc tịch. Tham gia một phiên tòa hoặc một cuộc phỏng vấn khi được yêu cầu. Tới lễ nhập tịch.