Search is poor on the Amazon UK site too. I often fail to find a book that is old or out-of-print using Amazon's search. Or I try to search for a particular brand and model. I then turn to a Google search for the exact title + author (or brand + model). Google's search results display the correct Amazon entry at the top or near the top of the search results. In other words, Google does a better job at finding products on Amazon that Amazon's own search feature.

I can only assume that Amazon has simply so much stock that they can no longer categorise many products correctly. Or they simply don't care.

Also, Amazon is flooded with 'drop-shippers' desperate to inflate their search ranking on Amazon. YouTube is stuffed with videos recommending sellers adopt unsavoury SEO tactics to manipulate Amazon search results.

eBay has a better structured, categorised approach to finding products. The eBay approach is not perfect, but better than Amazon.