The distinction between Sections 34 and 37 is that while the former requires a common intention for a criminal act done by several persons (i.e., unity of criminal behaviour which results in a criminal offence), in which case each actor becomes liable as if that act were done by him alone.
Image Source: thelawyersedge.com
Section 37 deals with intentional co-operation (which may not be the same as a common intention) in an offence committed by means of several acts, and punishes such co-operation (provided it consists in doing any one of those of acts either singly or jointly with any other person) as if it constituted the offence itself.
ADVERTISEMENTS:
Now, if intentional co-operation may not be the same as a common intention, it must include action which contributes to the offence and is done with the consciousness that the offence is on foot though without sharing the intention to commit that offence.