They are similar in a broad sense. "Look for" is simply to try and find something. "Search for" is try and find something that is hard to find. You could misplace your sunglasses for example and be searching for them all over the house but you wouldn't use the word "search for" when you are referring to a car.

they must be classmates :P

look for people ,search for your dog.an example,i cannot describe other situations.definitely follow your feeling,they only differ in mood

LMAO