Welcome to the Bunnings Workshop community. Thank you so much for joining us and sharing your question about identifying fixings for light electrical cords.
It sounds like you are looking for electrical cord clips. There are quite a few choices in style and size. Would it be possible for you to post a photo along with the measurement of the cable you are trying to fix onto your wall? This will give us a better idea of what you are using and will let us offer you a comprehensive recommendation.
We look forward to seeing the photos and measurements of your cable.