  Motivated by the recent experiment by Grayson et.al., we investigate a
non-ohmic current-voltage characteristics for the tunneling into fractional
quantum Hall liquids. We give a possible explanation for the experiment in
terms of the chiral Tomonaga-Luttinger liquid theory. We study the interaction
between the charge and neutral modes, and found that the leading order
correction to the exponent $\alpha$ $(I\sim V^\alpha)$ is of the order of
$\sqrt{\epsilon}$ $(\epsilon=v_n/v_c)$, which reduces the exponent $\alpha$. We
suggest that it could explain the systematic discrepancy between the observed
exponents and the exact $\alpha =1/\nu$ dependence.
