Hello, I only know how to write these three sounds:
- um or umm (is "uhm" possible?) - used to express doubt or uncertainty or to fill a pause when hesitating in speaking.
- aha! - used to express surprise, pleasure, or triumph.
- yahoo! - this one is obvious as it was even trademarked by a big website/company. although...
I just looked up and found only this about "yahoo": "a person who is not very intelligent or interested in culture"
So, is "yahoo!" not a sound to express joy?? (I once read about Yahoo, the company, that it was how the trademarked name has been created?? 
So, please, I'd like to know,
how to actually
write all possible non-word sounds in English correctly.
I mean, I know, there is often more than just one version.
e.g. "um" could be also written as "umm" or "ummm" depending on how long the thinker needs to complete a thought..

but if possible I'd like to know ALL possible "words" for such sounds that people pronounce when talking to their bodies on the street.(along with the meaning of those "non-words")
thanks!
BTW:
great forum here!