The search term you're looking for is "instrument approach procedure" where sometimes "procedure" will be replaced with "chart" or "plate". Jeppesen provides these commercially for the world in a convenient standardized format for a hefty fee, but the aviation authority for each country also publishes their own versions as part of the ICAO-mandated Aeronautical Information Publication (AIP). In most cases these can be found for free online though it may take some digging.
For the US, the third-party (free) website airnav.com provides a convenient index for the FAA information - search for an airport from their homepage and scroll down for the links under "Instrument Procedures".
Picking a European country at random, Austria's charts are here. Generally you'll want to search for the country's AIP first, then dig through that to look for the instrument procedure charts
I flew myself from California to the UK and back (via Canada, Greenland, Iceland & the Faero Islands) without paying anything for charts this way - paid a lot for fuel though!