documentclass[a4paper, 11pt, twoside,openright]{report}
usepackage{lipsum}

usepackage{titlesec}

titlespacingsection{0pt}{8pt plus 2pt minus 2pt}{0pt plus 2pt minus 2pt}
titlespacingsubsection{0pt}{8pt plus 2pt minus 2pt}{0pt plus 2pt minus 2pt}
titlespacingsubsubsection{2pt}{8pt plus 2pt minus 2pt}{0pt plus 2pt minus 2pt}


sloppy %avoid word passing the limits of page aligment.
begin{document}


chapter{uno prueva}
section{uno Section}
lipsum[1]
section{dos Section}
lipsum[2]
section{tres Section}
lipsum[3]
chapter{dos prueva}
section{uno Section}q
qsdfdqsf
section{dos Section}
qsdf
section{tres Section}
lipsum[1]

end{document}