The icky part of doing this is you get into situations where you have order of operation (since nobody would want to stop at just two conditions):
if variable1 = 'this' and variable2 = 'that' or variable3 = 'other'... to make it work right you have to express this as
(if variable1 = 'this' and variable2 = 'that') or variable3 = 'other'
-or-
if variable1 = 'this' and (variable2 = 'that' or variable3 = 'other')
Doing this in a visual, action-block way would be a fair undertaking. Saving that for later