diff --git a/Documents.md b/Documents.md
index cbae534..a843a49 100644
--- a/Documents.md
+++ b/Documents.md
@@ -1 +1,2 @@
-1. [Tài liệu hướng dẫn sử dụng](https://docs.google.com/document/d/1to1AZSry6npnIxZu80hSyC8xslUR5AmLvZvwKG0THkY/edit?tab=t.0)
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+1. [Tài liệu hướng dẫn sử dụng](https://docs.google.com/document/d/1to1AZSry6npnIxZu80hSyC8xslUR5AmLvZvwKG0THkY/edit?tab=t.0)
+2. [Tài liệu nghiên cứu](https://docs.google.com/document/d/1stOS94LzLVJIRa_2EanzmjbMmleh9tobyPT2sqflv6g/edit?tab=t.0)
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