lzr0 - 6:20 pm on Jul 22, 2013 (gmt 0)
Thanks for reply. All you said makes sense, but my question was a bit different. Say, I have a sub-page about ABC with url /abc.html and title "ABC guide". This page disappeared from search results for ABC, but still ranks high for many other keyphrases, which are not in url. So, the page itself is not penalized, it is just an issue with the main keyphrase.
I am looking for input and advice from people who experienced similar things. For example, is it worth removing ABC from the title even though the page is really about ABC, just to get out of Google's perceived over-optimization? Did it worked for someone, or did it not?