\documentclass[a4paper,12pt]{report}
\usepackage[tcvn]{vietnam}
\usepackage{geometry}
\geometry{left=30mm,right=25mm,bottom=20mm,top=45mm}
\usepackage{amsmath}
\usepackage{graphicx} 
\usepackage{wrapfig}

\let\up\MakeUppercase
\usepackage{fancyhdr}
\pagestyle{fancy}
\lhead{\textbf{Khoa luan tot nghiep}}
\rhead{\textbf{L--4A}}

\rfoot{\textbf{Khoa}}
%\cfoot{}
\lfoot{\textbf{Dai hoc}}
\renewcommand\headrulewidth{2pt}
\renewcommand\footrulewidth{2pt}

\begin{document}

\begin{titlepage}
\begin{center}
\vspace*{1in}
{\LARGE \textbf{Su hap thu}\\\textit{\textbf{Ccac kich thich}}}
\par
\vspace{1.5in}
{\large Thay huong dan: GS. TSKH. \\Nguoi thuc hien: Le }
\par
\vfill
KLTNDH
\par
\vspace{0.5in}
Khoa 
\par
\vspace{0.5in}
DHoc
\par
\vspace{0.5in}
\textit{Ngay thang nam}
\end{center}
\end{titlepage}

\pagenumbering{roman}
\tableofcontents
\listoffigures
\listoftables

\chapter*{Loi Cam On}
\addcontentsline{toc}{chapter}{Loi cam on}
Dau tien, em xin gui loi cam on

\chapter*{Mo dau}
\addcontentsline{toc}{chapter}{Mo dau}
Su tiep xuc giua cac khoa hoc



\chapter{Mang}
\pagenumbering{arabic}
\label{ch:tongquanmang}
\section{Khai niem}
Mang sinh hoc

\chapter*{Ket luan}

Voi doi tuong nghien cuu

\textit{Mot lan nua, em xin cam on }  

\appendix
\chapter{Phu luc }
\label{ch: phuluc}
\begin{center}
\textbf{Mang}

Co 12pt ne

{\small Co 11pt ne}

{\footnotesize Co 10pt ne}
\end{center}

Trong phan phu luc, ta se 
%**********************************************************************
\begin{thebibliography}{1}
\addcontentsline{toc}{chapter}{Tai lieu tham khao}
\bibitem{tk:nvhieu}
Nguyen Van Hieu, ``Phuong phap'', \emph{Nha XB}, (2000)
\end{thebibliography}
\end{document}