The image appears to be a document or a page from a book, written in Vietnamese. The text is divided into two columns with some sections highlighted in yellow and blue. The document seems to be discussing topics related to mathematics, as indicated by the terms "meng quy" (mathematics) and "hieu chung" (sum). 

Here's a breakdown of the content:

1. **Column 1:**
   - **Section 1:** Discusses problems related to the sum of numbers.
   - **Section 2:** Talks about the sum of numbers.

2. **Column 2:**
   - **Section 1:** Discusses the sum of numbers.
   - **Section 2:** Talks about the sum of numbers.

The document seems to be discussing mathematical concepts, specifically focusing on sums of numbers. The terms "meng quy" and "hieu chung" suggest that the document might be dealing with mathematical problems or exercises related to these