I found that searching for somthing with a hyphen in it will not be found e.g. Co-Op but the search will find items that have an underline e.g. Co_Op.

I do not know if this a bug or a feature request.

It appears to me that you have "Boolean Search" option enabled. When this option is enabled, a minus sign is used to say that need to exclude all Notes that have the word "op" onside. Just remove a checkbox from "Boolean Search" option, and everything will work as expected.

Yes your right. Sorry about that. I never use the "Boolean Search" and just never noticed it was checked.

Thanks Vlad for your prompt reply.