Abstract
In this article, we calculate the nonfactorizable soft contributions in the $B\ensuremath{\rightarrow}{\ensuremath{\eta}}_{c}K,{\ensuremath{\chi}}_{c0}K$ decays with the light-cone QCD sum rules approach. Our results show that the nonfactorizable corrections from the soft-gluon exchanges in the decay $B\ensuremath{\rightarrow}{\ensuremath{\eta}}_{c}K$ are of $(15\ensuremath{-}30)%$ and should be taken into account. As for the decay $B\ensuremath{\rightarrow}{\ensuremath{\chi}}_{c0}K$, the factorizable contributions are zero and the nonfactorizable contributions from the soft hadronic matrix elements are too small to accommodate the experimental data.
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