Not all the spells on this site are real. Many were posted by new members who didn't know about magick and posted what they liked.
How to get spells to work, if it is a working spell, it requires energy. Study before you cast, but basically you connect with the energy around us, charge an object with the energy, visualize the desired outcome of the spell, and in the process of casting the spell the energy is released on its path to create the change.
There is a lot of things you need to know before casting, so please study first. I would like to point out magick is natural energy, it can only effect energy, and it is a part of nature so it therefore cannot contradict nature. You are human, no spell can change this.