Without being able to better analyze the study or read critiques of it, it's impossible to tell. But even if the study is methodologically and statistically accurate the population (68) is far too small to draw any strong conclusions. At best it might indicate that further research is warranted. The problem is that the study doesn't stand alone. You'd have to have some large studies with some very strong results to overcome all the null result studies that are out there.
I tried but I can't find anything informative regarding homeopathic surgery. The best information I found regarding BHMS is here:
http://www.ngu.ac.in/Academic/homeopathic/bhmssyllbus.htm
I will say that I find this comment disturbing, "Hahnemann's Organon of Medicine is the high water mark of medical philosophy."
Here's a link to it in case anyone wants to take a look for themselves:
http://www.homeopathyhome.com/reference/organon/organon.html
As to why, here's an example:
"Whilst paying attention to those circumstances (§ 5) the physician needs only to remove the totality of the symptoms in order to cure the disease.
If all the symptoms be eradicated, the disease is always cured internally also."
This is not only is demonstrably false, but shows that homeopathy is intrinsically symptom oriented.
I found this interesting reference as well, HOMŒOPATHIC MATERIA MEDICA:
http://www.homeoint.org/books/boericmm/index.htm
~Raithere