Complex sentence: After his high school graduation, he taught in a school in Vadasserikkara (a village about 20 km away from Maramon), for a few years and then joined the Allahabad Agriculture University and cleared an Indian Dairy Diploma course with distinction.
Split into simpler sentences: After his high school graduation, he taught in a school in Vadaserikara (a village about 20 km away from Maramon) for a few years. Then he joined the Allahabad Agriculture University and passed an Indian Dairy Diploma course with distinction.