How to view contacts combined activity log?

I have an account with hundreds of contacts, I need to view his log of activities with ALL his contacts (comments on calls to contacts, estimates, invoices updates etc) - all ordered by the time of their execution - how can I get this data directly from ZOHO Invoice? This is really critical for me being able to manage my sales organization activities around the world. Note that all the relevant data is already being logged - all you need to do is simply to locate all the data between a specific time slot and present it on the dashboard activity log...