There is a button at the bottom of your screen that you can select to view all areas.
I was trying to figure this out too.... (I'm in the US). Even when I search "worldwide" it only pulls up like 170 listings...
On the left side there is a menu where you can check different things to narrow or expand your search...
Like "completed listings", "worldwide", etc... Worldwide doesn't pull up all of the listings though?? I know because I see a ton of things in the authenticate this section, that are never pulled up in my searches of "balenciaga"...
I know...I spaced when I read your response... I have done the 'worldwide' search, but have found the same as you...not everything seems to come up...