LaTeX.org

@Johannes_B: Thank for your reply.
i have added:
- code in overleaf that can compile: https://www.overleaf.com/13998715dxwtfgqcqcby
- pdf file
- image file
Thanks

Hi all,
i have chapter and this chapter don't have section: ex: infomation chapter, Acknowledgment chapter.
My latex:
Link in overleaf: https://www.overleaf.com/13998715dxwtfgqcqcby
\
\documentclass[a4paper,11pt]{book}
\usepackage{import}
\usepackage{example}

\usepackage[utf8]{inputenc ...

\documentclass[12pt]{article}
\usepackage[english]{babel}
\usepackage[utf8x]{inputenc}
\usepackage[utf8]{vietnam}
\usepackage{longtable}

\usepackage{amsmath}
\usepackage{tikz}
\begin{document}
%\chapter*{Test}
\begin{longtable}{p{7.8cm}|p{8.5cm}}
\textbf{Column 1} & \textbf{Column 2 ...