\documentclass{article}
\newcommand{\iiint}[1]{\int\!\!\!\int\limits_{#1}\!\!\!\int}
\newcommand{\iint}[1]{\int\!\!\!\int\limits_{\hspace{-1em}#1}}
\newcommand{\idotsint}[1]{\int\cdots\int_{\hspace{-1.8em}#1}}
\begin{document}
\[ \iint{(D)}\quad\iiint{V}\quad\idotsint{G} \]
\end{document}
