How can I get perrenial clover in my yard?

I have clover in some spots that grows in some areas and not others. I think it gives great ground cover and seems to grow symbiotically with St Augustin.

My front yard has a ton of dead patches and a rag tag of weeds. I'd like to plant a clover that will grow and stay until the St Augustine can really take foot . I've tried micro clover, red clover.. But nothing sticks. I'm also not interested in resodding and planting grass that needs frequent watering. My backyard just grows and needs very infrequent watering. My front yard is a totally different story.

What is the clover that grows like a weed down here and how can I plant it?