\begin{tocenv}
\tocitem \@locref{sec1}{\begin{@norefs}\@print{1}\quad{}Latin/Thai Character Set{}\end{@norefs}}
\tocitem \@locref{sec2}{\begin{@norefs}\@print{2}\quad{}Thai in \LaTeX{}\end{@norefs}}
\tocitem \@locref{sec3}{\begin{@norefs}\@print{3}\quad{}Thai in \hevea{}\end{@norefs}}
\end{tocenv}