  Neutral atomic hydrogen and molecular gas in the host galaxies of radio
active galactic nuclei (AGN) can be traced using H I 21-cm and OH-1667 MHz
absorption lines to understand the fueling and feedback processes. We present
the results of an H I and OH absorption survey with the Five-hundred-meter
Aperture Spherical radio Telescope (FAST) towards 40 radio sources of
low-intermediate radio luminosity ($\sim$10$^{23}$-10$^{26}$ W Hz$^{-1}$ at 1.4
GHz), red mid-infrared color (W2[4.6 $\mu$m]$-$W3[12 $\mu$m] $>$ 2.5 mag) and
redshift up to 0.35. From 13 sources with good data at H I observing
frequencies, we report the detection of H I absorption towards 8 sources, 5 of
which are new detections including 4 in the redshift range 0.25 to 0.35. Our
detection rates are consistent with our previous results with dependence on the
star-formation history of the host galaxy reflected in the mid-infrared
\textit{WISE} W2$-$W3 colors and the compactness of the radio source. We find
no significant dependence of detection rates on radio luminosity or redshift.
We also find that H I column densities are anti-correlated with the
low-frequency spectral indices ($\alpha_{\rm 150 MHz}^{\rm 1.4 GHz}$,
$S_{\nu}\propto \nu^{-\alpha}$). We do not have any detection from 23 sources
with good data at OH observing frequencies. However, by stacking the spectra we
estimate the 3$\sigma$ upper limit of OH column density to be
2.27$\times$10$^{14}$$T_{\rm ex}$/10 K $\times$1/$f_{\rm c}$ cm$^{-2}$. By
stacking the OH spectra for 7 associated H I absorbers, we get a 3$\sigma$
upper limit of 3.47$\times$10$^{14}$ $T_{\rm ex}$/10 K $\times$1/$f_{\rm c}$
cm$^{-2}$ on OH column density and 1.78$\times$10$^{-7}$ on [OH]/[H I] ratio.
