I think they are combined into one. This post is asking for the keyword REMOTE, search that to find remote positions.

Not everyone is specifying remote or not, though. :(

I guess you can assume not-remote if it doesn't say remote. If everyone who didn't allow remote were to specify "no remote" then it'd just mess with the folks who were searching for "remote", because it would also find "not-remote" and the folks searching for "remote" would get frustrated.

Whoops, this post could be annoying for those searching for "remote", couldn't it? I'll stop saying "remote" now. Sorry for saying "remote" so much.