Search for more hosts
And use the Get More Results options by right-clicking (control-click mac users) on the search tab.
Chances are you are connected to different ultrapeers & lost that connection with the hosts who had the file. Alternatives would be to close the program occasionally & re-open. Though that may take it either way.
Better or worse!
The way the gnutella network works, it very much depends upon which ultrapeers you are connected to.
(that's why LW Pro by connecting to 5 ultrapeers instead of Basic's 3 can sometimes be advantageous, though more-so for searching for rarer files.)
Network Horizon:
http://www.gnutellaforums.com/genera...ally-work.html