RSSSF file for Baichung's goals: here.  It says "scored at least 30 goals", which means there could be more.  Unless you could point out the exact matches where he as scored more that aren't listed in that RSSSF file, then he only has 30 goals.  Having said that, they list I.M. Vijayan as having scored more than Baichung with "at least 40 goals", here.