"chinese-italian food"
My question is: In this context, does the hyphen act the same as a space? What about other punctuation, such as &*%$#@!?
What I found is that hyphenation can bring up different serps and different ads - so it is worth a try.
However, based on my experience I found that in my markets the hyphenated versions of kw's did not work very well. Eventually I dumped them all.
Regardless, they are worth a trial and could work for you. As for the non-alpha-numerics; well, how many people use them in their search terms?
You won't know until you give it a try...
Syzygy