\documentclass{article}
\usepackage{geometry}
\geometry{
paperwidth=235mm, paperheight=145mm,
 left=5mm,
  right=5mm,
 top=10mm, bottom=10mm}%
 
\usepackage{tikz}
\usetikzlibrary{shapes,arrows,positioning}

\usepackage{xepersian}
\settextfont{Yas}
\setdigitfont{Yas}
\setlatintextfont{Times New Roman}

\begin{document}
\pagestyle{empty}


% Define block styles
\tikzstyle{block} = [rectangle, draw, fill=blue!20, 
    text width=6em, text centered, rounded corners, minimum height=4em]
\tikzstyle{line} = [draw=red,draw,very thick]% -latex',
\tikzstyle{point}=[circle,minimum size=0pt,inner sep=0pt]

\centering   
\begin{tikzpicture}[node distance = 3cm, auto]
    % Place nodes
    \node [block] (4-1-4) {\rl{قضیه 4.1.4}};
    \node [block, right of= 4-1-4] (10-1-4) {\rl{لم 10.1.4}};
    \node [point,right of=10-1-4,xshift=-1.5cm](pt1) {};
    \node [block,above right of=10-1-4,xshift=1cm] (9-1-4) {\rl{لم 9.1.4}};
    \node [block,above of=9-1-4] (5-1-4) {\rl{لم 5.1.4}};
    \node [block, left of=5-1-4] (4-1-4n) {\rl{قضیه 4.1.4\\برای حالت $n=2$}};
    \node [block,below right of=10-1-4,xshift=1cm] (8-1-4a) {\rl{لم 8.1.4 (الف)}};
    \node [point,right of=8-1-4a,xshift=-1.5cm](pt2) {};
    \node [block,below of=8-1-4a] (8-1-4b) {\rl{لم 8.1.4 (ب)}};
    \node [block,above right of=8-1-4a,xshift=1cm] (6-1-4) {\rl{لم 6.1.4}};
    \node [block,below right of=8-1-4a,xshift=1cm](7-1-4) {\rl{لم 7.1.4}};
    \node [block, right of= 6-1-4] (1-1-4) {\rl{قضیه 1.1.4}};
%    % Draw edges
    \path [line,->] (10-1-4) -- (4-1-4);
    \path [line] (9-1-4) -| (pt1);
    \path [line,->] (pt1) -- (10-1-4);
    \path [line] (8-1-4a) -| (pt1);	
    \path [line] (6-1-4) -| (pt2);
    \path [line] (7-1-4) -| (pt2);
    \path [line ,->] (pt2) --(8-1-4a);
\end{tikzpicture}

\end{document}