I'm sorry, but I have no idea what you're talking about. What's the first string, and what's the second? And what do the "to"s mean in your description? Sorry to be so dense.
The eBay syntax for "or" is words within parens, separated by commas. Any combination of words (or "or" modules within parens) separated by spaces operates as an "and", and anything preceded by a hyphen is a "not". For example:
(cinelli, poliaghi, rossin) -(touring, randonneur) vintage frame
would find vintage frames by any of those three manufacturers, but leave out auctions with "touring" or "randonneur" in the title (or description, if you have that box checked).