`(-2-m;1-m)`$\cap$`[-3;6]=`$\emptyset$

`<=>` $\begin{cases} -2-m<1-m\\\left[\begin{matrix} -2-m\ge6\\ 1-m\le-3\end{matrix}\right. \end{cases}$

`<=>` $\begin{cases} -m+m<2+1\\\left[\begin{matrix} -m\ge8\\ -m\le-4\end{matrix}\right. \end{cases}$

`<=>` $\begin{cases} 0<3(lđ)\\\left[\begin{matrix} m\le-8\\ m\ge4\end{matrix}\right. \end{cases}$

Vậy `m\le-8` hoặc `m\ge4`