On Team Builder if you go in with yourself and another person, or even yourself if you don't wanna queue and just wanna wait for a team you basically have to select the lanes/roles for the rest of your team. Say you have a Top and a Jungler. So you are looking for a Mid, Support and ADC (assuming normal meta). So you select "Mid/Any" for the Mid laner and "Bottom/Marksman" and "Bottom/Support" for your bottom lane, because if you don't and just search for "Bottom/Any" twice you'll more than likely just keep getting ADCs and no Supports for both slots.
People who queue as say Shen trying to go bot lane and queue in Team Builder as "Bottom/Tank" are harder to find because of this and should still queue as "Bottom/Support" essentially.