You seem to have Azoospermia
as such because you have got a hydrocele on the left side and right side testis if normal should have made good amount of sperms- infact one testis is also suffient for fertility
is secreted by interstitial cells and that is not affected by azoospermia.
Hydrocele as a cause of azoopermia is debatable and you have got only unilateral problem.
There is no proven remedy-natural/surgical/medical that can really show efficacy to correct sperm count
I hope that answers your query.