With those type of anchors I would say given the substrate material of choice in those countries the only way to be sure of a sound fix would be through bolted with a plate on the inside of that wall.
Shield anchors (chemfix or expandable bolts) should go in with an 80/20 rule, 80% of the thread in the block work, ideally at least 3/4 of the way into that outer course. If the block is 200mm thick you would want minimum 180-200mm length shield anchor, you should have at least 150mm in the wall, and 30mm sticking out of the wall, enough for material thickness, load washer, spring/lock washer, and nut, with 2-3 threads sticking out at the end after the nut.
Shield anchors (chemfix or expandable bolts) should go in with an 80/20 rule, 80% of the thread in the block work, ideally at least 3/4 of the way into that outer course. If the block is 200mm thick you would want minimum 180-200mm length shield anchor, you should have at least 150mm in the wall, and 30mm sticking out of the wall, enough for material thickness, load washer, spring/lock washer, and nut, with 2-3 threads sticking out at the end after the nut.