\documentclass[a4paper]{book}

\usepackage{blindtext}
\usepackage{lipsum}

\usepackage{tocloft}
\setcounter{tocdepth}{5}
% 				��������� ���������� � ������� tocloft

\cftsetrmarg{15em} 						% tocloft --- ������ ��������� �� ������ ���.


\begin{document}
\tableofcontents

\part{The Very Begining}
	\chapter{Some things}
		\section{Some things in detail}
			\subsection{This subsection has very long title, whith no short version for ToC}
				\subsubsection{This is subsubsection with several words title}
				\subsubsection{This is subsubsection with another title, which quite more long}
		\section{Very-very-very long, \emph{very-very-very} long and strange title only to demonstrate how it looks in \textsc{The Table of Contents}}

%\lipsum[1]
\part{Today}
	\chapter{That is the matter?}
  \Blinddocument

\end{document}





