  Observing WZ/ZZ production at the Tevatron in a final state with a lepton,
missing transverse energy and jets is extremely difficult because of the low
signal rate and the huge background. In an attempt to increase the acceptance
we study the sample where three high-energy jets are reconstructed, where about
1/3 of the diboson signal events are expected to end. Rather than choosing the
two E$_{T}$-leading jets to detect a Z signal, we make use of the information
carried by all jets. To qualify the potential of our method, we estimate the
probability of observing an inclusive diboson signal at the three standard
deviations level (P$_{3\sigma}$) to be about four times larger than when using
the two leading jets only. Aiming at applying the method to the search for the
exclusive WZ/ZZ$\rightarrow \ell \nu q\bar{q}$ channel in the three jets
sample, we analyzed separately the sample with at least one $b$-tagged jet and
the sample with no tags. In WZ/ZZ$\rightarrow \ell \nu b\bar{b}$ search, we
observe a modest improvement in sensitivity over the option of building the
Z-mass from the two leading jets in E$_T$ . Studies for improving the method
further are on-going.
