Option #1: at least one word

While searching for "rolling stone", the search will return every song that has EITHER the word "rolling" or the word "stone" in it. The song does not have to have both of these words.

Option #2: all words

In this scenario, BOTH words have to be found in the song. However, the words can be found ANYWHERE in the song, not necessarily in the order. For example, in "WHERE ARE YOU TONIGHT?", you see the following:

There's a long-distance train rolling through the rain, tears on the letter I write.
There's a woman I long to touch and I miss her so much but she's drifting like a satellite.
There's a neon light ablaze in this green smoky haze, laughter down on Elizabeth Street.
And a lonesome bell tone in that valley of stone where she bathed in a stream of pure heat.

Dig? See how it works?

Option #3: exact phrase

In this scenario, only songs that have "rolling stone", in that order, will be found.

How does it feel
How does it feel
To be without a home
Like a complete unknown
Like a rolling stone?