This is the list from Ricky Horror for Doodle God on Windows Phone :
Sins Vs Virtues Quest (be aware that on Win 8 it's actually called Devil Vs God)
human + human = birth, love
human + order = discipline
human + fun = cheerfulness
human + religion = faith
human + faith = salvation
human + work = diligence
human + money = gift
gift + cellphone = free apps
free apps + cellphone = altruism
fun + money = donation
donation + money = charity
charity + human = generosity
life + death/corpse = resurrection
sin + light = virtue
virtue + human = tolerance, assistance
virtue + energy = calmness
virtue + fun = joy
virtue + wrath = humility
virtue + pride = modesty
virtue + faith = hope
water + bread = diet
diet + grass/weeds = vegetarianism
diet + religion = fasting
And for Doodle God Blitz, you have to add :
Scientist/Wizard + Sex = Continence
Priest + Sex = Chastity
Alcohol + Order = Abstention
Work + Sex = Sublimation