I was surfing the web looking for a robotic vaccum cleaner. Thy don't sell Roomba in Europe (a WTF in itself) so I was looking for info on an Electrolux Trilobite. I found it being sold on a local eshop and since I found the product there I used their search function to look for a Roomba (just in case). No luck so I looked around a bit and then entered 'trilobite' in the search field to go back. No product found.
Odd.
I went back via back button and copy-pasted the product name in the search field and this time it found it. I typed it by hand and it didn't. Turns out the product name on their page was in uppercase and I was typing in lowercase.
Their search engine is case-sensitive.