The best of both worlds
एक ही समय में दो अलग-अलग अवसरों का आनंद ले सकते हैं।
E.g. By working part-time and looking after her kids two days a week she managed to get the best of both worlds.

See eye to eye
किसी के साथ सहमत होना।
E.g. They finally saw eye to eye on the business deal.

When pigs fly
कुछ ऐसा जो कभी नहीं होगा।
E.g. When pigs fly she’ll tidy up her room.

To kill two birds with one stone
एक बार में दो समस्याओं को हल करने के लिए।
E.g. By taking my dad on holiday, I killed two birds with one stone. I got to go away but also spend time with him.