A google search would return all documents that contain John OR Jacob OR Jingleheimer OR Smith.
In other words, adding search terms in an AND search narrows down the pile of results to closer and closer to what you actually want.
In a google search, the pile gets deeper and deeper every time you add a word to the narrow the search.
The google hep people I've talked to blandly assure me that this is an AND search - You get every document that has the word John, and every document that has the word Jacob, and every document that has the word Jingleheimer and...
I have a precious, way cool, 84 yr old neighbor who has recently lost the hearing in her left ear from an acoustic neuroma, or tumor. The tumor is growing and since she is otherwise fit, her doctors have recommended surgical removal. Dr Hitzelberger performed this surgery on a friend of hers in California approx 8 or 9 years ago.
Anyhow, my neighbor asked me to look up information about this Dr for a second opinion or to read about any research he may have done. I've hit a blank wall. zero, notta, nuttin about the good doc.