"Try and" Vs. "Try to"

Hi guys,

I noticed recently that people usually use the construction "try and" in a context that "try to" seems to be the most evident option. I would like to know the difference between those two constructions.

Examples:
1. I'll try and find my keys ----> I'll try to find my keys.
2. I will try and get more food ----> I will try to get more food.

Thanks in advance