Here are 11 herbs that you can try (source: http://naturalsociety.com/11-herbs-naturally-improve-lactation-nursing-mothers/):
Fenugreek, Milk Thistle, Shatavari, Indonesian Torbangun, Turmeric, Ginger, Goat’s Rue, Alfalfa, Anise, Fennel Seed, Blessed Thistle
Everyone is different. Hope you can find one that helps!