We could increase the statistics of Higgs search in WH ->
l + nu + b + b-bar channel using the CDF soft lepton b-tagging and
loose secondary vertex b-tagging in addition to the CDF secondary
vertex b-tagging by a factor of 1.8.  We studied several kinematic variables
to enhance the signal significance of the Higgs search.  We found a Higgs
scattering angle in WH CM system, cos(theta_H), is effective for this
purpose.  With |cos(theta_H)| < 0.8 cut, we obtained the signal significance
better than before by 7% for a Higgs mass of 100 GeV/c^2.  Discovery Higgs
mass limit at an integrated luminosity of 30 fb^-1 is 120 GeV/c^2.