Yes, you would be seeing better results with private proxies entered in for searching. There are also a few other things that will affect the number of links you will see from running NHSEO, including:
- Keywords used
- Number of "Max Threads" used (trial is limited to 15 threads)
- Number of "Allowed Search Threads"
- Number of profiles being run
I am not sure where would allow the use of private proxies for just a few days I'm afraid, most are rented on a monthly basis. Your settings can make a big difference to the amount of links created as well so if you have any limiting factors such as PR, OBL or bad words this can make a big difference also.
Generally, running with private proxies for searching, with the default trial settings I will see more than 200 links per days.