It has already been asked about removing autofill URL entries in Chrome: How to remove one or all auto-complete text entries in Chrome?
In my case the question is how to remove the autofill SEARCH terms. The difference is that URL entries appear with a document icon and can be removed with Shift+Delete, but the same procedure doesn't work with entries shown next to a magnifying glass.
In my case I cannot remove the "192.168.I.I" entry.
As additional info, I get that suggestion on different computers, and I found out that it appeared also on one where I never logged in my Google account (I installed Chrome, and shortly after there it was).
How can I clean my account or computer completely from that suggestion? or is it maybe an autofill that Google recommends because lots of people wrongly type?