Flushing dns mac os 10.9.2?

When I run suggested protocol to flush DNS (dscacheutil -flushcache;sudo killall -HUP mDNSResponder) nothing happens.
What I am really trying to do: I have an accumulation of websites that pop up as suggestions when I want to create a document hyperlink to a site on the web. i want to clear this list. Is that part of the DNS cache flush?
If not, how can I get rid of this list?
If so, why doesn't the protocol above work?
Thanks...

Thanks. I didn't ask the question very well.
I am doing a power point presentation and am creating hot links to pages of websites.
In the dialog box to insert a hyper link there is a field at the top ("link to") in which the destination website address is supposed to be entered.
There are "suggested" websites in a list that shows up when I click on the arrow to the right this field.
I don't want that list to appear any more.
I thought it would be something to do with erasing a cache...so I tried to do a DNS flush as I describe, above, but nothing happened. I entered the two commands (one after the other) and all I got was a new line on which to enter another command.
My main goal is to get rid of that list in the insert hyperlink dialog box -- I don't like any such lists.
I am now, additionally, interested in why the DNS flush does not apparently work.
Thanks for any help you might be able to give.

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Flushing dns mac os 10.9.2?

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