How can I keep less blank space on two sides?

Question

Possible Duplicate:
How do I change my margins and spacing to fit the PhD thesis requirements of University XYZ?

My Latex file looks like the following:e

\documentclass[11pt,a4paper,oneside]{report}

\usepackage{t1enc}
\usepackage{alltt}
\usepackage{epsfig}
\usepackage[english, finnish, swedish]{babel}
\usepackage{url}
\usepackage{multirow}
\usepackage{eurosym} % To get a euro sign: \euro{}
\usepackage{verbatim}
\usepackage{fancyvrb}
\usepackage{supertabular}
\usepackage{longtable}

\usepackage[breaklinks=true]{hyperref}
\hypersetup{pdfborder = {0 0 0},citecolor=black,filecolor=black,linkcolor=black,urlcolor=black}


\raggedbottom%Do.
\usepackage{listings}
\lstset{language=C}
\setcounter{secnumdepth}{5}
%\setlength{\belowcaptionskip}{6pt}
\usepackage[belowskip=-15pt,aboveskip=0pt]{caption}
\setlength{\intextsep}{10pt plus 2pt minus 2pt}

\parskip 1ex
\parindent 0pt

%All the words with special hyphenation:
\hyphenation{di-gi-taa-li-sta yksi-suun-tai-sta}


\hyphenpenalty=5000
\tolerance=1000

% Command

\begin{document}
\evensidemargin 19mm
\oddsidemargin 19mm
\textwidth 155mm

%%%%%%%%%%     PREAMBLE + DOC SETTINGS ENDS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% By default, only up to 3rd level headers are numbered (e.g. 1.2.2.)
\setcounter{secnumdepth}{4} % what headers are numbered
\setcounter{tocdepth}{4} %what headers are put in the TOC

%% -------------- ABSTRACT --------------
\cleardoublepage
\phantomsection
\input{abstract_english}


% -------------- ACKNOWLEDGEMENTS & TOC --------------

\input{acknowledgement}


%\clearpage

\newpage
{\fontfamily{phv}\selectfont \tableofcontents}

\newpage
\phantomsection \label{listoftab}
\addcontentsline{toc}{chapter}{List of Tables}
\listoftables

\newpage
\phantomsection \label{listoffig}
\addcontentsline{toc}{chapter}{List of Figures}
\listoffigures
\cleardoublepage

\newpage
\phantomsection \label{listofacronyms}
\addcontentsline{toc}{chapter}{Abbreviations and Acronyms}
\input{acronyms}
\cleardoublepage

%%%%%%%%%%%%%% The main content starts here %%%%%%%%%%%%%%%%%

\parskip1ex
\parindent0mm

\pagenumbering{arabic}
\pagestyle{headings}

\input{chapter1}

\cleardoublepage
\phantomsection
\addcontentsline{toc}{chapter}{Bibliography}
\bibliographystyle{plain}

\bibliography{mySources}

\label{pages-text}
\end{document}

Please forgive me if it looks a little more complicated that it should. It looks like this because its a common template for Masters Thesis.

Now the output looks like:

Now u should see that, there are too much space on both sides of the text. How may I reduce it and make the text wider?

Bye.