documentclass[tikz,border=5pt]{standalone}

begin{document}

begin{tikzpicture}[node distance=1.5cm]
tikzstyle{one} = [rectangle, rounded corners, minimum width=3cm, text width=8cm, minimum height=1cm, draw=black, fill=gray!30]
tikzstyle{two} = [rectangle, rounded corners, minimum width=3cm, text width=8cm, minimum height=1cm, draw=black, fill=gray!30]
tikzstyle{thr} = [rectangle, rounded corners, minimum width=3cm, text width=8cm, minimum height=1cm, draw=black, fill=gray!30]
tikzstyle{fou} = [rectangle, rounded corners, minimum width=3cm, text width=8cm, minimum height=1cm, draw=black, fill=gray!30]
tikzstyle{fiv} = [rectangle, rounded corners, minimum width=3cm, text width=6cm, text centered, minimum height=1cm, draw=black, fill=gray!30]

node (on) [one]{small (1) the combination of sound macroeconomic management};
node (tw) [two,below of=on]{small (2) increased reliance on market mechanisms};
node (th) [thr,below of=tw]{small (3) a strong emphasis on the delivery of social services};
node (fo) [fou,below of=th]{small (4) sustained improvements in infrastructure};

node (fv) [fiv, left of=tw, yshift=-.75cm, xshift=-4cm, rotate=90]{small Macroeconomic reforms, textit{textbf{doi moi}}, implemented by the government of Vietnam, in the late 1980’s};


draw (on.west) -| (tw.west);

end{tikzpicture}

end{document}