Numerous times a search of Amazon.com for tags, using the default search text, does not return the proper CD, even when I purchased the CD from Amazon.
I discovered today that I can type in the UPC number (Universal Product Code) from the back of the CD case (12 digits), and the Amazon search returns the exact CD! Very handy.
Example: search on "Smooth Jazz Christmas" brings up 10 albums, none of which are correct. Search on "723721230456" (UPC code on the CD case), brings up the exact album, cover and all.