吃着碗里，看着锅里

chī zhe wǎn lǐ , kàn zhe guō lǐchizhewanli,kanzheguoli

1. lit. eyeing what's in the pot as one eats from one's bowl (idiom)
2. not content with what one already has
3. (of men, typically) to have the wandering eye

Study it in Yanamino