1st goto your connections tab and see how many connections you have going... the default is 4. If u have dsl or cable T-1 , T-3 ect you can change it to more then 4. That will connect you to more hosts then u would have a larger # of files that the search can go through to find the file u want.

As far as your getting 0 results then getting 200. Remember everytime u type something in the search field your going to hit a different server . So yes that is normal and the amount of hosts and files being shared across the network changes by the second .

Personally I don't like 1.8 as opposed to 1.6 cuz the older versions showed at the bottom left how many hosts u were connected to and the amount of files being shared . I don't see it on 1.8 it just shows how many files your sharing . Hope that helps good luck !!!!!