These weeds have a deep taproot that’s tough to dig out, though you can try hand-digging if the plants are small and you get the root.
Use a pre-emergent herbicide, and make sure to get it down when the soil reaches the appropriate temperature.
Put down a pre-emergent in late summer for control the next spring. And mow your grass at the proper height for the species so you don’t scalp the lawn and allow weed seeds to take hold
Pre-emergent herbicides don’t work. Look for post-emergent products that are labeled specifically for sedges.
You won’t be able to eradicate white clover. In fact, it does provide food for honeybees so you can learn to live with it.