Sufficient conditions for the oscillation and asymptotic behavior of solutions of neutral differential equations of the form "[a(t)[(x(t)+c(t)x(δ(t)))"]^γ]'=q(t)χ^α(τ(t))+p(t)χ^β(σ(t))" are established using comparison theorems. They improve and complement to the existing results. Examples are provided to illustrate the main results.