There are many synonyms for the phrase "with the help of which". Some common alternatives include "by means of which", "through which", "via which", "using which", "thanks to which", and "with the aid of which". These phrases are all used to indicate that something has been accomplished using a specific tool, method, or resource. When choosing a synonym for "with the help of which", it is important to consider the context of the sentence and the intended meaning. Some phrases may sound more formal or technical than others, and some may be more appropriate for certain types of writing or speaking.