Can use the same pins for multiple 74HC4067 and/or 74HC4051 chips.
The "selector switches" of the chips then are of course in the same position.
But that is ok if you e.g. connect the outputs to different analogue inputs.
Maybe you should tell us why you want to do this.
Leo..
i do a project that has 2 74hc4067, and i run out off outputs, but i dont need 16 more outputs that 74hc4067 have. i need 3 or 5 so i thing to use a smaller ic.
This makes a lot of work for me, and I do not have the time, as others need it. Take the time to draw a schematic and post it. Hand drawn or with CAD, either is OK. Be sure pins are labeled. Frizzy pictures a schematic they do not make. You might also post your code.