HOW TO CONVERT TEXT FROM OTHER CHARACTER SETS (NOT UNICODE) TO VNI-ANSI USING MICROSOFT WORD:
1 - Copy and paste the text you want to convert into MS Word program:

2 - From VNI menu, select "Convert Vietnamese Text" option:
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3 - The program will auto-convert the text in your document into VNI-ANSI as in the sample window. If the result in Sample window is correct, you may click on "OK" button to complete the conversion or click on "AutoGuess Source BCH" button to try other character set sources:
4 - In this example, click on "OK" button to complete the conversion and your document will be converted as the sample window displayed.