@andyt1980 ,
Currently using the advanced search functionality of Smart Manager plugin, you can surely search for string containing -1 or any such other strings.
But for specifically searching products starting/ending with a specific string, we are currently working on the same and will surely update here once it has been released.
@andyt1980 ,
Would like to update you that we have released a new update for
the Smart Manager plugin [i.e. v6.5.0] which does consists of ‘starts with, ends with, not starts with and not ends with’ advanced search operators for text fields which was requested by you and its available in the Pro version.
Request you to kindly have a check with the Smart Manager demo for your reference.