  In this article, we calculate the nonfactorizable soft contributions in the
$B \to \eta_c K, \chi_{c0} K$ decays with the light cone QCD sum rules
approach. Our results show that the nonfactorizable corrections from the soft
gluon exchanges in the decay $B \to \eta_c K$ are of $(15-30)%$ and should not
be neglected. As for the decay $B \to \chi_{c0} K$, the factorizable
contributions are zero and the nonfactorizable contributions from the soft
hadronic matrix elements are too small to accommodate the experimental data.
