Nap training?

Sa
Has anyone been able to have any success with nap training? Our little girl is 19wks old and sleeps very well at night, and has an apparently age appropriate bedtime of 7:30ish... but everyday we struggle with naps and getting anywhere close to the recommended hours of sleep per day because of it. She only naps for 32ish mins at a time (one sleep cycle). I have read that apparently this can be normal until 6ish months of age... but just curious if other mommas have any success stories of elongating naps?! 
She's a sweetheart, but better daytime sleep would be lovely!!!