Complex sentence: Seventeen trains run in each direction daily between Samut Sakhon and Wongwian Yai and four trains run daily in each direction between Samut Sakhon and Samut Songkhram.
Split into simpler sentences: Seventeen trains run daily in each direction between Samut Sakhon and Wongwian Yai. Four trains run daily between Samut Sakhon and Samut Songkhram.