  The physical state of $\rho$-$\omega$-$\phi$ mesons can be mixed by the
unitary matrix. The decay processes of $\omega \rightarrow \pi^{+}\pi^{-}$ and
$\phi \rightarrow \pi^{+}\pi^{-}$ are from the isospin symmetry breaking. The
$\rho-\omega$, $\rho-\phi$ and $\omega-\phi$ interferences lead to resonance
contribution to produce the strong phases. The $CP$ asymmetry is considered
from above isospin symmetry breaking due to the new strong phase for the first
order. It has been found the $CP$ asymmetry can be enhanced greatly for the
decay process of $B^{0}\rightarrow\pi^+\pi^{-}\eta^{(')}$ when the invariant
masses of the $\pi^+\pi^{-}$ pairs are in the area around the $\omega$
resonance range and the $\phi$ resonance range in perturbative QCD. We also
discuss the possibility to search the predicted $CP$ violation at the LHC.
