How to get best results for flat abs?

I work out my abdominal area everyday of the week. I do 100+ crunches, 30 leg lifts, and 20 bicycle crunches. I run a mile everyday after working my abs. I’m not seeing results and I’ve been doing this for about 4 months. My abs feel somewhat hard but they don’t look toned at all. I watch what I eat and I try my best to balance my meals. Any suggestions on what I should do to get results? Thank you.