  Let $f$ be a partially hyperbolic diffeomorphism. $f$ is called has the
quasi-shadowing property if for any pseudo orbit $\{x_k\}_{k\in \mathbb{Z}}$,
there is a sequence $\{y_k\}_{k\in \mathbb{Z}}$ tracing it in which $y_{k+1}$
lies in the local center leaf of $f(y_k)$ for any $k\in \mathbb{Z}$. $f$ is
called topologically quasi-stable if for any homeomorphism $g$ $C^0$-close to
$f$, there exist a continuous map $\pi$ and a motion $\tau$ along the center
foliation such that $\pi\circ g=\tau\circ f\circ\pi$. In this paper we prove
that if $f$ is dynamically coherent then it has quasi-shadowing and topological
quasi-stability properties.
