  While stellar processes are believed to be the main source of feedback in
dwarf galaxies, the accumulating discoveries of AGN in dwarf galaxies over
recent years arouse the interest to also consider AGN feedback in them. Fast,
AGN-driven outflows, a major mechanism of AGN feedback, have indeed been
discovered in dwarf galaxies and may be powerful enough to provide feedback to
their dwarf hosts. In this paper, we search for outflows traced by the
blueshifted ultraviolet absorption features in three dwarf galaxies with AGN
from the sample examined in our previous ground-based study. We confirm
outflows traced by blueshifted absorption features in two objects and
tentatively detect an outflow in the third object. In one object where the
outflow is clearly detected in multiple species, photoionization modeling
suggests that this outflow is located $\sim$0.5 kpc from the AGN, implying a
galactic-scale impact. This outflow is much faster and possesses higher kinetic
energy outflow rate than starburst-driven outflows in sources with similar star
formation rates, and is likely energetic enough to provide negative feedback to
its host galaxy as predicted by simulations. Much broader ($\sim$4000 km
s$^{-1}$) absorption features are also discovered in this object which may have
the same origin as that of broad absorption lines in quasars. Additionally,
strong He II $\lambda$1640 emission is detected in both objects where the
transition falls in the wavelength coverage, and is consistent with an AGN
origin. In one of these two objects, blueshifted He II emission line is clearly
detected, likely tracing a highly-ionized AGN wind.
