If the planetary condition is just not good as part of your horoscope or the stars are certainly not inside your favor then this puja is strongest. Nav Chandi yagya is the combination of 1000 mantras which might be exported kind Markandeya Purana. In Markandeya Purana, you'll find various mantras https://www.youtube.com/watch?v=QIX0JZlLsgE