I'm on a laptop and don't use a smartphone, so ymmv. Go back to the Kitchens title page and look for the search box at the top. Type in the subject (I'll use white cabinets as an example), which should prompt a drop-down box with different options, such as 'white cabinets in kitchens'. Click on the one you want to search.

You can also google 'Houzz white cabinets in kitchens', to see if anything shakes out. Good luck!

It used to be very logical. For quite a while now, it is very random and not reliable.