If your cooker hood isn't extracting cooking odours, then it's likely you'll need to replace the cooker hood filter. In this video, eSpares explain how to use universal cooker hood paper grease filters.
This is an Electruepart universal paper grease filter for your cooker hood. It measures 114 x 47 cm but it can be cut down or folded to size for any cooker hood within those dimensions. The filter features saturation indicators which turn red when the filter is ready to be changed.