Mounting a cordless vacuum on laundry wall, plasterboard, small area unfortunately not able to put on a stud. Tried screw in anchors and the plasterboard or whatever it is just seems too hard.

so then I tried hollow wall anchors and realised I don't have the 28 dollar setting tool!

In our old house, I often used the screw in anchors and they worked...My question is, do the screw in anchors not always work in hollow stud walls? Maybe my technique is wrong? Different types of plasterboard? What are your favourite fixings for light loads like this?