broad question really, you should do a lot of studying before casting to understand spells and magick better because spell casting requires a few things.
in answer to your question, no, not every spell on this site works. magick is a natural energy, it is a part of nature, spells require this energy to be focused and directed for the spell to work. this is why any type of spell that contradicts nature does not work [so you can rule out anything in the Fantasy or Trick section for this reason] next you have your grey areas in magick that have been debating on for some time [weather and death spell specifically] i wouldn't recommend touching those until you have a strong grasp of magick and what it's capable of.
spells that do work include love, luck, wealth, protection, cleansing, binding, banishing, healing, summoning, beauty, job, and curses [and a variety of others which typically fall into those categories] this doesn't mean every single spell in these sections work however, a spell could be flawed in the procedure or ingredients, or the caster themselves can miscast the spell causing it to be a dud. for this reason it's best to do a little research and study until attempting a spell so you have a higher chance of success.