work on

phrasal verb
1
to try to persuade somebody to agree to something or to do something
قانع کردن, متقاعد کردن, ترغیب کردن
2
to try hard to improve or achieve something
پرداختن به, مشغول شدن به, کارکردن روی
You need to work on your pronunciation a bit more.
‘Have you sorted out a babysitter yet?’ ‘No, but I'm working on it.’
We are working on plans for a new swimming pool.