In your situation, Sabre Dot Res is a better tool to use. Zuji will list all fares that are published. Sabre will only list the ones that apply for the dates you enter. For example, suppose there were 4 fares
AAAAA
AAAAB
AAAAC
AAAAD
And you wanted to travel dep mon ret the next thu. It is possible that AAAAA only allows weekend departures, AAAAB only allows travel May-Aug, and AAAAC has a 14 day minimum stay. This would leave you with only AAAAD. The fare that shows up on DotRes will be the cheapest applicable T fare for your dates considering the rules.
Cheers,