  We have analysed the data collected by OPAL at centre-of-mass energies
between 189 and 209 GeV searching for Higgs boson candidates from the process
e+e- -> h0Z0 followed by the decay of h0 -> A0A0 where A0 is the CP-odd Higgs
boson. The search is done in the region where the A0 mass, mA, is below the
production threshold for bbbar, and the CP-even Higgs boson mass mh is within
the range 45-86 GeV/c^2. In this kinematic range, the decay of h0 -> A0A0 may
be dominant and previous Higgs boson searches have very small sensitivities.
This search can be interpreted within any model that predicts the existence of
at least one scalar and one pseudoscalar Higgs boson. No excess of events is
observed above the expected Standard Model backgrounds. Model-independent
limits on the cross-section for the process e+e- -> h0Z0 are derived assuming
100% decays of the h0 into A0A0 and 100% decays of the A0A0 into each of the
following final states: ccbarccbar, gggg, tau+tau-tau+tau-, ccbargg ggtau+tau-
and ccbartau+tau-. The results are also interpreted in the CP-conserving
no-mixing MSSM scenario, where the region 45 <= mh <= 85 GeV/c^2 and 2<= mA <=
9.5 GeV/c^2 is excluded.
